Factors of 1491
The factors of 1491 are 1, 3, 7, 21, 71, 213, 497, 1491. It has 8 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 1491 is a whole number that divides it with nothing left over. You only need to test the numbers up to √1491 ≈ 38.61; 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 + 7 + 21 + 71 + 213 + 497 + 1491 = 2304. Without 1491 itself that is 813, so 1491 is a deficient number.
LaTeX source of the formulas on this page
\[ 1491 = 3 \times 7 \times 71 \]
Factor pairs of 1491
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 1491 | 1 × 1491 = 1491 |
| 3 | 497 | 3 × 497 = 1491 |
| 7 | 213 | 7 × 213 = 1491 |
| 21 | 71 | 21 × 71 = 1491 |
Questions
What are the factors of 1491?
The factors of 1491 are 1, 3, 7, 21, 71, 213, 497, 1491. It has 8 factors.
What are the prime factors of 1491?
3, 7, 71. As a product: 3 × 7 × 71.
How many factors does 1491 have?
1491 has 8 factors (4 factor pairs).
What is the sum of the factors of 1491?
2304.
Is 1491 a prime number?
No. It is divisible by 3, so 1491 = 3 × 497.