Factors of 31

The factors of 31 are 1 and 31. That is 2 factors in total.

A factor of 31 is a whole number that divides 31 exactly, with no remainder. 31 is a prime number: its only factors are 1 and itself.

Factor pairs of 31

Two numbers that multiply to give 31:

1 × 31 = 31

Prime factorization of 31

31 is prime, so its prime factorization is just 31.

Quick facts about 31

Is 31 prime? Yes.
Even or odd: odd.
Sum of its factors: 1 + 31 = 32.

Factors of nearby numbers

Number	Factors
27	1, 3, 9, 27
28	1, 2, 4, 7, 14, 28
29	1, 29
30	1, 2, 3, 5, 6, 10, 15, 30
32	1, 2, 4, 8, 16, 32
33	1, 3, 11, 33
34	1, 2, 17, 34
35	1, 5, 7, 35

More about 31: 31 squared · square root of 31 · 31 in binary · 31 in Roman numerals.

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