Factors of 8
The factors of 8 are 1, 2, 4, 8. It has 4 factors.
Factors of 8
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 8 is a whole number that divides it with nothing left over. You only need to test the numbers up to √8 ≈ 2.83; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 4 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 2 + 4 + 8 = 15. Without 8 itself that is 7, so 8 is a deficient number.
LaTeX source of the formulas on this page
\[ 8 = 2^{3} \]Factor pairs of 8
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 8 | 1 × 8 = 8 |
| 2 | 4 | 2 × 4 = 8 |
Questions
What are the factors of 8?
The factors of 8 are 1, 2, 4, 8. It has 4 factors.
What are the prime factors of 8?
2. As a product: .
How many factors does 8 have?
8 has 4 factors (2 factor pairs).
What is the sum of the factors of 8?
15.
Is 8 a prime number?
No. It is divisible by 2, so 8 = 2 × 4.