Factors of 90

The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45 and 90. That is 12 factors in total.

A factor of 90 is a whole number that divides 90 exactly, with no remainder. 90 is a composite number because it has factors other than 1 and itself.

Factor pairs of 90

Two numbers that multiply to give 90:

1 × 90 = 90
2 × 45 = 90
3 × 30 = 90
5 × 18 = 90
6 × 15 = 90
9 × 10 = 90

Prime factorization of 90

90 = 2 × 3 × 3 × 5 = 2 × 3² × 5. The prime factors of 90 are 2, 3 and 5.

Quick facts about 90

Is 90 prime? No.
Even or odd: even.
Sum of its factors: 1 + 2 + 3 + 5 + 6 + 9 + 10 + 15 + 18 + 30 + 45 + 90 = 234.

Factors of nearby numbers

Number	Factors
86	1, 2, 43, 86
87	1, 3, 29, 87
88	1, 2, 4, 8, 11, 22, 44, 88
89	1, 89
91	1, 7, 13, 91
92	1, 2, 4, 23, 46, 92
93	1, 3, 31, 93
94	1, 2, 47, 94

More about 90: 90 squared · square root of 90 · 90 in binary · 90 in Roman numerals.

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