Factors of 891
The factors of 891 are 1, 3, 9, 11, 27, 33, 81, 99, 297, 891. It has 10 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 891 is a whole number that divides it with nothing left over. You only need to test the numbers up to ā891 ā 29.85; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 10 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 3 + 9 + 11 + 27 + 33 + 81 + 99 + 297 + 891 = 1452. Without 891 itself that is 561, so 891 is a deficient number.
LaTeX source of the formulas on this page
\[ 891 = 3^{4} \times 11 \]Factor pairs of 891
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 891 | 1 Ć 891 = 891 |
| 3 | 297 | 3 Ć 297 = 891 |
| 9 | 99 | 9 Ć 99 = 891 |
| 11 | 81 | 11 Ć 81 = 891 |
| 27 | 33 | 27 Ć 33 = 891 |
Questions
What are the factors of 891?
The factors of 891 are 1, 3, 9, 11, 27, 33, 81, 99, 297, 891. It has 10 factors.
What are the prime factors of 891?
3, 11. As a product: Ć 11.
How many factors does 891 have?
891 has 10 factors (5 factor pairs).
What is the sum of the factors of 891?
1452.
Is 891 a prime number?
No. It is divisible by 3, so 891 = 3 Ć 297.