Factors of 16

The factors of 16 are 1, 2, 4, 8 and 16. That is 5 factors in total.

A factor of 16 is a whole number that divides 16 exactly, with no remainder. 16 is a composite number because it has factors other than 1 and itself.

Factor pairs of 16

Two numbers that multiply to give 16:

1 × 16 = 16
2 × 8 = 16
4 × 4 = 16

Prime factorization of 16

16 = 2 × 2 × 2 × 2 = 2⁴. The prime factors of 16 are 2.

Quick facts about 16

Is 16 prime? No.
Even or odd: even.
Sum of its factors: 1 + 2 + 4 + 8 + 16 = 31.
16 is a perfect square (4 × 4), so it has an odd number of factors.

Factors of nearby numbers

Number	Factors
12	1, 2, 3, 4, 6, 12
13	1, 13
14	1, 2, 7, 14
15	1, 3, 5, 15
17	1, 17
18	1, 2, 3, 6, 9, 18
19	1, 19
20	1, 2, 4, 5, 10, 20

More about 16: 16 squared · square root of 16 · 16 in binary · 16 in Roman numerals.

Another number? Try the prime number checker, the GCF and LCM calculator or see all factor lists.