Factors of 660
The factors of 660 are 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660. It has 24 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 660 is a whole number that divides it with nothing left over. You only need to test the numbers up to √660 ≈ 25.69; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 24 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: the sum is 2016. Without 660 itself that is 1356, so 660 is an abundant number.
LaTeX source of the formulas on this page
\[ 660 = 2^{2} \times 3 \times 5 \times 11 \]Factor pairs of 660
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 660 | 1 × 660 = 660 |
| 2 | 330 | 2 × 330 = 660 |
| 3 | 220 | 3 × 220 = 660 |
| 4 | 165 | 4 × 165 = 660 |
| 5 | 132 | 5 × 132 = 660 |
| 6 | 110 | 6 × 110 = 660 |
| 10 | 66 | 10 × 66 = 660 |
| 11 | 60 | 11 × 60 = 660 |
| 12 | 55 | 12 × 55 = 660 |
| 15 | 44 | 15 × 44 = 660 |
| 20 | 33 | 20 × 33 = 660 |
| 22 | 30 | 22 × 30 = 660 |
Questions
What are the factors of 660?
The factors of 660 are 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660. It has 24 factors.
What are the prime factors of 660?
2, 3, 5, 11. As a product: × 3 × 5 × 11.
How many factors does 660 have?
660 has 24 factors (12 factor pairs).
What is the sum of the factors of 660?
2016.
Is 660 a prime number?
No. It is divisible by 2, so 660 = 2 × 330.