Factors of 25

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What are the Factors of 25?

Answer

Factors of 25:

1, 5, 25

3 factors · 25 = 5² · composite

Underlined — prime: 5 · 1 — neither prime nor composite · others — composite

Factor pairs of 25

2 pairs: 1 × 25 · 5 × 5

5 × 5 is a pair of one factor — that is why 25 has an odd number of factors, 3.

25 = 5² → (2 + 1) = 3 factors: add 1 to each exponent and multiply.

Related Calculations

See Also

Prime Number Checker - Find out whether a given number is Prime or not
Prime Factorization - Prime Factorization Calculator
Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between

Recalculate with different values ↑

Factors Table

Number	Factors
10	1, 2, 5, 10
11	1, 11
12	1, 2, 3, 4, 6, 12
13	1, 13
14	1, 2, 7, 14
15	1, 3, 5, 15
16	1, 2, 4, 8, 16
17	1, 17
18	1, 2, 3, 6, 9, 18
19	1, 19
20	1, 2, 4, 5, 10, 20
21	1, 3, 7, 21
22	1, 2, 11, 22
23	1, 23
24	1, 2, 3, 4, 6, 8, 12, 24
25	1, 5, 25
26	1, 2, 13, 26
27	1, 3, 9, 27
28	1, 2, 4, 7, 14, 28
29	1, 29
30	1, 2, 3, 5, 6, 10, 15, 30
31	1, 31
32	1, 2, 4, 8, 16, 32
33	1, 3, 11, 33
34	1, 2, 17, 34
35	1, 5, 7, 35
36	1, 2, 3, 4, 6, 9, 12, 18, 36
37	1, 37
38	1, 2, 19, 38
39	1, 3, 13, 39

FAQ

What are the Factors of 25?

Factors of 25: 1, 5, 25

How many factors does 25 have?

Number 25 has 3 factors

How many Factor Pairs does 25 have?

Number 25 has 2 factor pairs

Is 25 a prime or composite number?

Composite: 25 = 5², so it has 3 factors — a prime has exactly two.

How many factors does 25 have excluding 1 and 25?

1: 5.

Why does 25 have an odd number of factors?

25 is a perfect square: in the pair 5 × 5 the factor 5 pairs with itself, so the 3 factors are 1 pair plus 5.