Factors of 690
The factors of 690 are 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690. It has 16 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 690 is a whole number that divides it with nothing left over. You only need to test the numbers up to √690 ≈ 26.27; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 16 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: the sum is 1728. Without 690 itself that is 1038, so 690 is an abundant number.
LaTeX source of the formulas on this page
\[ 690 = 2 \times 3 \times 5 \times 23 \]
Factor pairs of 690
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 690 | 1 × 690 = 690 |
| 2 | 345 | 2 × 345 = 690 |
| 3 | 230 | 3 × 230 = 690 |
| 5 | 138 | 5 × 138 = 690 |
| 6 | 115 | 6 × 115 = 690 |
| 10 | 69 | 10 × 69 = 690 |
| 15 | 46 | 15 × 46 = 690 |
| 23 | 30 | 23 × 30 = 690 |
Questions
What are the factors of 690?
The factors of 690 are 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690. It has 16 factors.
What are the prime factors of 690?
2, 3, 5, 23. As a product: 2 × 3 × 5 × 23.
How many factors does 690 have?
690 has 16 factors (8 factor pairs).
What is the sum of the factors of 690?
1728.
Is 690 a prime number?
No. It is divisible by 2, so 690 = 2 × 345.