Factors of 99
The factors of 99 are 1, 3, 9, 11, 33, 99. It has 6 factors.
Factors of 99
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 99 is a whole number that divides it with nothing left over. You only need to test the numbers up to ā99 ā 9.95; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 6 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 3 + 9 + 11 + 33 + 99 = 156. Without 99 itself that is 57, so 99 is a deficient number.
LaTeX source of the formulas on this page
\[ 99 = 3^{2} \times 11 \]Factor pairs of 99
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 99 | 1 Ć 99 = 99 |
| 3 | 33 | 3 Ć 33 = 99 |
| 9 | 11 | 9 Ć 11 = 99 |
Questions
What are the factors of 99?
The factors of 99 are 1, 3, 9, 11, 33, 99. It has 6 factors.
What are the prime factors of 99?
3, 11. As a product: Ć 11.
How many factors does 99 have?
99 has 6 factors (3 factor pairs).
What is the sum of the factors of 99?
156.
Is 99 a prime number?
No. It is divisible by 3, so 99 = 3 Ć 33.