Factors of 126
The factors of 126 are 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126. It has 12 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 126 is a whole number that divides it with nothing left over. You only need to test the numbers up to √126 ≈ 11.22; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 12 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 2 + 3 + 6 + 7 + 9 + 14 + 18 + 21 + 42 + 63 + 126 = 312. Without 126 itself that is 186, so 126 is an abundant number.
LaTeX source of the formulas on this page
\[ 126 = 2 \times 3^{2} \times 7 \]Factor pairs of 126
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 126 | 1 × 126 = 126 |
| 2 | 63 | 2 × 63 = 126 |
| 3 | 42 | 3 × 42 = 126 |
| 6 | 21 | 6 × 21 = 126 |
| 7 | 18 | 7 × 18 = 126 |
| 9 | 14 | 9 × 14 = 126 |
Questions
What are the factors of 126?
The factors of 126 are 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126. It has 12 factors.
What are the prime factors of 126?
2, 3, 7. As a product: 2 × × 7.
How many factors does 126 have?
126 has 12 factors (6 factor pairs).
What is the sum of the factors of 126?
312.
Is 126 a prime number?
No. It is divisible by 2, so 126 = 2 × 63.