Factors of 780
The factors of 780 are 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780. It has 24 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 780 is a whole number that divides it with nothing left over. You only need to test the numbers up to √780 ≈ 27.93; 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 2352. Without 780 itself that is 1572, so 780 is an abundant number.
LaTeX source of the formulas on this page
\[ 780 = 2^{2} \times 3 \times 5 \times 13 \]Factor pairs of 780
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 780 | 1 × 780 = 780 |
| 2 | 390 | 2 × 390 = 780 |
| 3 | 260 | 3 × 260 = 780 |
| 4 | 195 | 4 × 195 = 780 |
| 5 | 156 | 5 × 156 = 780 |
| 6 | 130 | 6 × 130 = 780 |
| 10 | 78 | 10 × 78 = 780 |
| 12 | 65 | 12 × 65 = 780 |
| 13 | 60 | 13 × 60 = 780 |
| 15 | 52 | 15 × 52 = 780 |
| 20 | 39 | 20 × 39 = 780 |
| 26 | 30 | 26 × 30 = 780 |
Questions
What are the factors of 780?
The factors of 780 are 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780. It has 24 factors.
What are the prime factors of 780?
2, 3, 5, 13. As a product: × 3 × 5 × 13.
How many factors does 780 have?
780 has 24 factors (12 factor pairs).
What is the sum of the factors of 780?
2352.
Is 780 a prime number?
No. It is divisible by 2, so 780 = 2 × 390.