Factors of 9

The factors of 9 are 1, 3 and 9. That is 3 factors in total.

A factor of 9 is a whole number that divides 9 exactly, with no remainder. 9 is a composite number because it has factors other than 1 and itself.

Factor pairs of 9

Two numbers that multiply to give 9:

1 × 9 = 9
3 × 3 = 9

Prime factorization of 9

9 = 3 × 3 = 3². The prime factors of 9 are 3.

Quick facts about 9

Is 9 prime? No.
Even or odd: odd.
Sum of its factors: 1 + 3 + 9 = 13.
9 is a perfect square (3 × 3), so it has an odd number of factors.

Factors of nearby numbers

Number	Factors
5	1, 5
6	1, 2, 3, 6
7	1, 7
8	1, 2, 4, 8
10	1, 2, 5, 10
11	1, 11
12	1, 2, 3, 4, 6, 12
13	1, 13

More about 9: 9 squared · square root of 9 · 9 in binary · 9 in Roman numerals.

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