Factors of 70
The factors of 70 are 1, 2, 5, 7, 10, 14, 35, 70. It has 8 factors.
Factors of 70
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 70 is a whole number that divides it with nothing left over. You only need to test the numbers up to √70 ≈ 8.37; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 8 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 2 + 5 + 7 + 10 + 14 + 35 + 70 = 144. Without 70 itself that is 74, so 70 is an abundant number.
LaTeX source of the formulas on this page
\[ 70 = 2 \times 5 \times 7 \]
Factor pairs of 70
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 70 | 1 × 70 = 70 |
| 2 | 35 | 2 × 35 = 70 |
| 5 | 14 | 5 × 14 = 70 |
| 7 | 10 | 7 × 10 = 70 |
Questions
What are the factors of 70?
The factors of 70 are 1, 2, 5, 7, 10, 14, 35, 70. It has 8 factors.
What are the prime factors of 70?
2, 5, 7. As a product: 2 × 5 × 7.
How many factors does 70 have?
70 has 8 factors (4 factor pairs).
What is the sum of the factors of 70?
144.
Is 70 a prime number?
No. It is divisible by 2, so 70 = 2 × 35.