Factors of 30
The factors of 30 are 1, 2, 3, 5, 6, 10, 15, 30. It has 8 factors.
Factors of 30
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 30 is a whole number that divides it with nothing left over. You only need to test the numbers up to √30 ≈ 5.48; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 8 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 2 + 3 + 5 + 6 + 10 + 15 + 30 = 72. Without 30 itself that is 42, so 30 is an abundant number.
LaTeX source of the formulas on this page
\[ 30 = 2 \times 3 \times 5 \]
Factor pairs of 30
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 30 | 1 × 30 = 30 |
| 2 | 15 | 2 × 15 = 30 |
| 3 | 10 | 3 × 10 = 30 |
| 5 | 6 | 5 × 6 = 30 |
Questions
What are the factors of 30?
The factors of 30 are 1, 2, 3, 5, 6, 10, 15, 30. It has 8 factors.
What are the prime factors of 30?
2, 3, 5. As a product: 2 × 3 × 5.
How many factors does 30 have?
30 has 8 factors (4 factor pairs).
What is the sum of the factors of 30?
72.
Is 30 a prime number?
No. It is divisible by 2, so 30 = 2 × 15.