Factors of 1131
The factors of 1131 are 1, 3, 13, 29, 39, 87, 377, 1131. It has 8 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 1131 is a whole number that divides it with nothing left over. You only need to test the numbers up to √1131 ≈ 33.63; 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 + 3 + 13 + 29 + 39 + 87 + 377 + 1131 = 1680. Without 1131 itself that is 549, so 1131 is a deficient number.
LaTeX source of the formulas on this page
\[ 1131 = 3 \times 13 \times 29 \]
Factor pairs of 1131
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 1131 | 1 × 1131 = 1131 |
| 3 | 377 | 3 × 377 = 1131 |
| 13 | 87 | 13 × 87 = 1131 |
| 29 | 39 | 29 × 39 = 1131 |
Questions
What are the factors of 1131?
The factors of 1131 are 1, 3, 13, 29, 39, 87, 377, 1131. It has 8 factors.
What are the prime factors of 1131?
3, 13, 29. As a product: 3 × 13 × 29.
How many factors does 1131 have?
1131 has 8 factors (4 factor pairs).
What is the sum of the factors of 1131?
1680.
Is 1131 a prime number?
No. It is divisible by 3, so 1131 = 3 × 377.