Factors of 256
256 has 9 factors.
All factors of 256
1, 2, 4, 8, 16, 32, 64, 128, 256
Prime factorization: 2⁸
Number of factors
9
Sum of factors
511
Prime?
No
Factor pairs of 256
Each pair multiplies together to make 256:
| Pair | Product |
|---|---|
| 1 × 256 | 256 |
| 2 × 128 | 256 |
| 4 × 64 | 256 |
| 8 × 32 | 256 |
| 16 × 16 | 256 |
Factors of nearby numbers
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Frequently asked questions
What are the factors of 256?+
The factors of 256 are 1, 2, 4, 8, 16, 32, 64, 128, 256 — that is 9 factors in total.
What is the prime factorization of 256?+
The prime factorization of 256 is 2⁸.
Is 256 a prime number?+
No. 256 has 9 factors, more than just 1 and itself, so it is a composite number.