Factors of 420
The factors of 420 are the integers that divide it evenly, meaning they leave no remainder. These factors come in pairs, for example, (1, 420), (-1, -420), and (-1, -420). They are always whole numbers and can be found using methods like division or prime factorization. Knowing the factors of 420 helps in learning about prime numbers, multiples, and divisibility rules. This page will show all the positive factors, factor pairs, and the prime factorization of 420 in a clear and simple way.
What are the Factors of 420?
The factors of 420 are the numbers that can divide it exactly with no remainder left behind. Those numbers are 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210 and 420. Their negative counterparts are -1, -2, -3, -4, -5, -6, -7, -10, -12, -14, -15, -20, -21, -28, -30, -35, -42, -60, -70, -84, -105, -140, -210 and -420. Each factor contributes to the mathematical makeup of 420. Knowing factors helps you understand multiplication, division, and number properties. 420 is a composite number because it can be expressed as a product of smaller integers.
Factors of 420: 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210 and 420
Factor Pairs of 420
The factor pairs of 420 represent all the ways two numbers can multiply to result in 420. The positive pairs are (1, 420), (2, 210), (3, 140), (4, 105), (5, 84), (6, 70), (7, 60), (10, 42), (12, 35), (14, 30), (15, 28), (20, 21), and the negative ones are (-1, -420), (-2, -210), (-3, -140), (-4, -105), (-5, -84), (-6, -70), (-7, -60), (-10, -42), (-12, -35), (-14, -30), (-15, -28), (-20, -21). Each pair is a mirror of how numbers work together in multiplication. Learning about factor pairs strengthens your understanding of multiplication, division, and number patterns, and connects to topics like the greatest common factor and prime numbers. You can also explore how factor pairs relate to the greatest common factor and prime factorization for deeper understanding.
Positive Factor Pairs of 420:
| Factor 1 | Factor 2 |
|---|---|
| 1 | 420 |
| 2 | 210 |
| 3 | 140 |
| 4 | 105 |
| 5 | 84 |
| 6 | 70 |
| 7 | 60 |
| 10 | 42 |
| 12 | 35 |
| 14 | 30 |
| 15 | 28 |
| 20 | 21 |
Negative Factor Pairs of 420:
| Factor 1 | Factor 2 |
|---|---|
| -1 | -420 |
| -2 | -210 |
| -3 | -140 |
| -4 | -105 |
| -5 | -84 |
| -6 | -70 |
| -7 | -60 |
| -10 | -42 |
| -12 | -35 |
| -14 | -30 |
| -15 | -28 |
| -20 | -21 |
Prime Factorization of 420
Prime factorization means expressing a number as a multiplication of its prime numbers. For the number 420, the prime factors obtained through repeated division are 2, 2, 3, 5, 7. Hence, the prime factorization of 420 is 2^2 × 3 × 5 × 7. This knowledge is widely used in various areas of mathematics, including finding LCM, GCF, and reducing fractions to their simplest form.
Prime factors of 420:
2, 2, 3, 5, 7
Prime factorization of 420:
2 × 2 × 3 × 5 × 7
Compact form:
22 × 3 × 5 × 7
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How to Find the Factors of 420?
To explore the factors of 420, start by dividing it by integers up to its square root. Each number that divides 420 completely forms a factor pair with the quotient, giving both members of the pair. This method minimizes redundant checks and provides a clear way to see how 420 can be expressed as products of smaller numbers. It’s particularly useful for students learning divisibility, multiplication, and the basics of number theory.
Optimized steps to find factors of 420:
- •420 ÷ 1 = 420 → ✅ Factor Pair: (1, 420)
- •420 ÷ 2 = 210 → ✅ Factor Pair: (2, 210)
- •420 ÷ 3 = 140 → ✅ Factor Pair: (3, 140)
- •420 ÷ 4 = 105 → ✅ Factor Pair: (4, 105)
- •420 ÷ 5 = 84 → ✅ Factor Pair: (5, 84)
- •420 ÷ 6 = 70 → ✅ Factor Pair: (6, 70)
- •420 ÷ 7 = 60 → ✅ Factor Pair: (7, 60)
- •420 ÷ 10 = 42 → ✅ Factor Pair: (10, 42)
- •420 ÷ 12 = 35 → ✅ Factor Pair: (12, 35)
- •420 ÷ 14 = 30 → ✅ Factor Pair: (14, 30)
- •420 ÷ 15 = 28 → ✅ Factor Pair: (15, 28)
- •420 ÷ 20 = 21 → ✅ Factor Pair: (20, 21)
This method avoids unnecessary checks and quickly identifies all factor pairs, making it especially helpful for larger numbers.
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Frequently Asked Questions about factors of 420
What are the factors of 420?
The factors of 420 are 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420.
What is the prime factorization of 420?
The prime factorization of 420 is 2 × 2 × 3 × 5 × 7.
How do I find the factors of 420?
To find the factors of 420, start by dividing 420 by every number from 1 up to the square root of 420.
What are factor pairs of 420?
The factor pairs of 420 are (1, 420), (-1, -420), (2, 210), (-2, -210), (3, 140), (-3, -140), (4, 105), (-4, -105), (5, 84), (-5, -84), (6, 70), (-6, -70), (7, 60), (-7, -60), (10, 42), (-10, -42), (12, 35), (-12, -35), (14, 30), (-14, -30), (15, 28), (-15, -28), (20, 21), (-20, -21).
How can I use the factors of 420?
The factors of 420 can be used to simplify fractions, find the greatest common divisor (GCD), and determine multiples.
Are the factors of 420 always positive?
Factors can be both positive and negative. For example, the negative factors of 420 are -1, -2, -3, -4, -5, -6, -7, -10, -12, -14, -15, -20, -21, -28, -30, -35, -42, -60, -70, -84, -105, -140, -210, -420.