Factors of 25
The factors of 25 are 1, 5, 25. It has 3 factors.
Factors of 25
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 25 is a whole number that divides it with nothing left over. You only need to test the numbers up to √25 ≈ 5.00; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 3 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 5 + 25 = 31. Without 25 itself that is 6, so 25 is a deficient number.
LaTeX source of the formulas on this page
\[ 25 = 5^{2} \]Factor pairs of 25
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 25 | 1 × 25 = 25 |
| 5 | 5 | 5 × 5 = 25 |
Questions
What are the factors of 25?
The factors of 25 are 1, 5, 25. It has 3 factors.
What are the prime factors of 25?
5. As a product: .
How many factors does 25 have?
25 has 3 factors (2 factor pairs, one of them 5 × 5).
What is the sum of the factors of 25?
31.
Is 25 a prime number?
No. It is divisible by 5, so 25 = 5 × 5.