Factors of 90
90 has 12 factors.
All factors of 90
1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
Prime factorization: 2 × 3² × 5
Number of factors
12
Sum of factors
234
Prime?
No
Factor pairs of 90
Each pair multiplies together to make 90:
| Pair | Product |
|---|---|
| 1 × 90 | 90 |
| 2 × 45 | 90 |
| 3 × 30 | 90 |
| 5 × 18 | 90 |
| 6 × 15 | 90 |
| 9 × 10 | 90 |
Factors of nearby numbers
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Frequently asked questions
What are the factors of 90?+
The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90 — that is 12 factors in total.
What is the prime factorization of 90?+
The prime factorization of 90 is 2 × 3² × 5.
Is 90 a prime number?+
No. 90 has 12 factors, more than just 1 and itself, so it is a composite number.