Factors of 140
The factors of 140 are 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140. It has 12 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 140 is a whole number that divides it with nothing left over. You only need to test the numbers up to √140 ≈ 11.83; 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 + 4 + 5 + 7 + 10 + 14 + 20 + 28 + 35 + 70 + 140 = 336. Without 140 itself that is 196, so 140 is an abundant number.
LaTeX source of the formulas on this page
\[ 140 = 2^{2} \times 5 \times 7 \]Factor pairs of 140
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 140 | 1 × 140 = 140 |
| 2 | 70 | 2 × 70 = 140 |
| 4 | 35 | 4 × 35 = 140 |
| 5 | 28 | 5 × 28 = 140 |
| 7 | 20 | 7 × 20 = 140 |
| 10 | 14 | 10 × 14 = 140 |
Questions
What are the factors of 140?
The factors of 140 are 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140. It has 12 factors.
What are the prime factors of 140?
2, 5, 7. As a product: × 5 × 7.
How many factors does 140 have?
140 has 12 factors (6 factor pairs).
What is the sum of the factors of 140?
336.
Is 140 a prime number?
No. It is divisible by 2, so 140 = 2 × 70.