Factors of 9999
The factors of 9999 are 1, 3, 9, 11, 33, 99, 101, 303, 909, 1111, 3333, 9999. It has 12 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 9999 is a whole number that divides it with nothing left over. You only need to test the numbers up to √9999 ≈ 99.99; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 12 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 3 + 9 + 11 + 33 + 99 + 101 + 303 + 909 + 1111 + 3333 + 9999 = 15912. Without 9999 itself that is 5913, so 9999 is a deficient number.
LaTeX source of the formulas on this page
\[ 9999 = 3^{2} \times 11 \times 101 \]Factor pairs of 9999
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 9999 | 1 × 9999 = 9999 |
| 3 | 3333 | 3 × 3333 = 9999 |
| 9 | 1111 | 9 × 1111 = 9999 |
| 11 | 909 | 11 × 909 = 9999 |
| 33 | 303 | 33 × 303 = 9999 |
| 99 | 101 | 99 × 101 = 9999 |
Questions
What are the factors of 9999?
The factors of 9999 are 1, 3, 9, 11, 33, 99, 101, 303, 909, 1111, 3333, 9999. It has 12 factors.
What are the prime factors of 9999?
3, 11, 101. As a product: × 11 × 101.
How many factors does 9999 have?
9999 has 12 factors (6 factor pairs).
What is the sum of the factors of 9999?
15912.
Is 9999 a prime number?
No. It is divisible by 3, so 9999 = 3 × 3333.