Factors of 309
The factors of 309 are 1, 3, 103, 309. It has 4 factors.
Factors of 309
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 309 is a whole number that divides it with nothing left over. You only need to test the numbers up to ā309 ā 17.58; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 4 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 3 + 103 + 309 = 416. Without 309 itself that is 107, so 309 is a deficient number.
LaTeX source of the formulas on this page
\[ 309 = 3 \times 103 \]
Factor pairs of 309
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 309 | 1 Ć 309 = 309 |
| 3 | 103 | 3 Ć 103 = 309 |
Questions
What are the factors of 309?
The factors of 309 are 1, 3, 103, 309. It has 4 factors.
What are the prime factors of 309?
3, 103. As a product: 3 Ć 103.
How many factors does 309 have?
309 has 4 factors (2 factor pairs).
What is the sum of the factors of 309?
416.
Is 309 a prime number?
No. It is divisible by 3, so 309 = 3 Ć 103.