Factors of 25
There are 3 factors of 25 — the full list is below, with factor pairs, prime factorization, and divisibility notes.
Factors of 25
1, 5, 25
Factor pairs of 25
- 1 × 25
- 5 × 5
Prime factorization of 25
25 = 5²
Number facts
- 25 is a composite number.
- 25 has 3 factors.
- 25 is a perfect square.
- The sum of all factors of 25 is 31.
Divisibility rules that apply to 25
- 25 is divisible by 5 because it ends in 0 or 5.
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How the factors of 25 are calculated
To find the factors of 25, every whole number from 1 up to the square root of 25(about 5.00) is tested for even division. 25 is odd, and it divides evenly by 5. Written as a product of primes, 25 = 5². 25 is also a perfect square, which is why one of its factor pairs is a number multiplied by itself.
Frequently asked questions about 25
How many factors does 25 have?
25 has 3 factors: 1, 5, 25.
Is 25 a prime number?
No. 25 is composite because it has factors other than 1 and itself.
What are the factor pairs of 25?
The factor pairs of 25 are 1 × 25, 5 × 5.
What is the prime factorization of 25?
The prime factorization of 25 is 5².