Factors of 3999
The factors of 3999 are 1, 3, 31, 43, 93, 129, 1333, 3999. It has 8 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 3999 is a whole number that divides it with nothing left over. You only need to test the numbers up to √3999 ≈ 63.24; 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 + 31 + 43 + 93 + 129 + 1333 + 3999 = 5632. Without 3999 itself that is 1633, so 3999 is a deficient number.
LaTeX source of the formulas on this page
\[ 3999 = 3 \times 31 \times 43 \]
Factor pairs of 3999
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 3999 | 1 × 3999 = 3999 |
| 3 | 1333 | 3 × 1333 = 3999 |
| 31 | 129 | 31 × 129 = 3999 |
| 43 | 93 | 43 × 93 = 3999 |
Questions
What are the factors of 3999?
The factors of 3999 are 1, 3, 31, 43, 93, 129, 1333, 3999. It has 8 factors.
What are the prime factors of 3999?
3, 31, 43. As a product: 3 × 31 × 43.
How many factors does 3999 have?
3999 has 8 factors (4 factor pairs).
What is the sum of the factors of 3999?
5632.
Is 3999 a prime number?
No. It is divisible by 3, so 3999 = 3 × 1333.