Factors of 390
The factors of 390 are 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390. It has 16 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 390 is a whole number that divides it with nothing left over. You only need to test the numbers up to √390 ≈ 19.75; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 16 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: the sum is 1008. Without 390 itself that is 618, so 390 is an abundant number.
LaTeX source of the formulas on this page
\[ 390 = 2 \times 3 \times 5 \times 13 \]
Factor pairs of 390
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 390 | 1 × 390 = 390 |
| 2 | 195 | 2 × 195 = 390 |
| 3 | 130 | 3 × 130 = 390 |
| 5 | 78 | 5 × 78 = 390 |
| 6 | 65 | 6 × 65 = 390 |
| 10 | 39 | 10 × 39 = 390 |
| 13 | 30 | 13 × 30 = 390 |
| 15 | 26 | 15 × 26 = 390 |
Questions
What are the factors of 390?
The factors of 390 are 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390. It has 16 factors.
What are the prime factors of 390?
2, 3, 5, 13. As a product: 2 × 3 × 5 × 13.
How many factors does 390 have?
390 has 16 factors (8 factor pairs).
What is the sum of the factors of 390?
1008.
Is 390 a prime number?
No. It is divisible by 2, so 390 = 2 × 195.