Factors of 1390
The factors of 1390 are 1, 2, 5, 10, 139, 278, 695, 1390. It has 8 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 1390 is a whole number that divides it with nothing left over. You only need to test the numbers up to √1390 ≈ 37.28; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 8 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 2 + 5 + 10 + 139 + 278 + 695 + 1390 = 2520. Without 1390 itself that is 1130, so 1390 is a deficient number.
LaTeX source of the formulas on this page
\[ 1390 = 2 \times 5 \times 139 \]
Factor pairs of 1390
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 1390 | 1 × 1390 = 1390 |
| 2 | 695 | 2 × 695 = 1390 |
| 5 | 278 | 5 × 278 = 1390 |
| 10 | 139 | 10 × 139 = 1390 |
Questions
What are the factors of 1390?
The factors of 1390 are 1, 2, 5, 10, 139, 278, 695, 1390. It has 8 factors.
What are the prime factors of 1390?
2, 5, 139. As a product: 2 × 5 × 139.
How many factors does 1390 have?
1390 has 8 factors (4 factor pairs).
What is the sum of the factors of 1390?
2520.
Is 1390 a prime number?
No. It is divisible by 2, so 1390 = 2 × 695.