Factors of 720
The factors of 720 are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720. It has 30 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 720 is a whole number that divides it with nothing left over. You only need to test the numbers up to √720 ≈ 26.83; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 30 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: the sum is 2418. Without 720 itself that is 1698, so 720 is an abundant number.
LaTeX source of the formulas on this page
\[ 720 = 2^{4} \times 3^{2} \times 5 \]Factor pairs of 720
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 720 | 1 × 720 = 720 |
| 2 | 360 | 2 × 360 = 720 |
| 3 | 240 | 3 × 240 = 720 |
| 4 | 180 | 4 × 180 = 720 |
| 5 | 144 | 5 × 144 = 720 |
| 6 | 120 | 6 × 120 = 720 |
| 8 | 90 | 8 × 90 = 720 |
| 9 | 80 | 9 × 80 = 720 |
| 10 | 72 | 10 × 72 = 720 |
| 12 | 60 | 12 × 60 = 720 |
| 15 | 48 | 15 × 48 = 720 |
| 16 | 45 | 16 × 45 = 720 |
| 18 | 40 | 18 × 40 = 720 |
| 20 | 36 | 20 × 36 = 720 |
| 24 | 30 | 24 × 30 = 720 |
Questions
What are the factors of 720?
The factors of 720 are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720. It has 30 factors.
What are the prime factors of 720?
2, 3, 5. As a product: × × 5.
How many factors does 720 have?
720 has 30 factors (15 factor pairs).
What is the sum of the factors of 720?
2418.
Is 720 a prime number?
No. It is divisible by 2, so 720 = 2 × 360.