Factors of 400
400 has 15 factors.
All factors of 400
1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400
Prime factorization: 2⁴ × 5²
Number of factors
15
Sum of factors
961
Prime?
No
Factor pairs of 400
Each pair multiplies together to make 400:
| Pair | Product |
|---|---|
| 1 × 400 | 400 |
| 2 × 200 | 400 |
| 4 × 100 | 400 |
| 5 × 80 | 400 |
| 8 × 50 | 400 |
| 10 × 40 | 400 |
| 16 × 25 | 400 |
| 20 × 20 | 400 |
Factors of nearby numbers
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Frequently asked questions
What are the factors of 400?+
The factors of 400 are 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400 — that is 15 factors in total.
What is the prime factorization of 400?+
The prime factorization of 400 is 2⁴ × 5².
Is 400 a prime number?+
No. 400 has 15 factors, more than just 1 and itself, so it is a composite number.