Factors of 8
The factors of 8 are the numbers that divide it exactly. Finding factors is the first step in simplifying fractions and factoring expressions.
A composite carrying 4 factors — factors always arrive in mirrored pairs, so the count comes out even. The largest prime factor is 2: 8 = 2 × 4. Every factor together sums to 15 — the proper divisors (all factors but 8 itself) add to 7, which is less than 8 itself, a deficient number. Shared factors between two numbers are what the GCF calculator hunts — the pairing column above feeds that search directly.
| Factor | Pairing |
|---|---|
| 1 | 1 × 8 = 8 |
| 2 | 2 × 4 = 8 |
| 4 | 4 × 2 = 8 |
| 8 | 8 × 1 = 8 |
Frequently asked questions
What are the factors of 8?
The factors of 8 are 1, 2, 4, 8 — that is 4 factors in total.
How do you find factors of 8?
Test each number from 1 up to 8: if it divides 8 with no remainder, it is a factor. Pair test — every factor pairs with a cofactor, like 1 × 2 = 8.
Why do factors matter for simplifying fractions?
Simplification divides both top and bottom by their greatest common factor — so a shared factor between two numbers, like you can find in the tables above, makes the fraction smaller and cleaner.