Factors of 12
There are 6 factors of 12 — the full list is below, with factor pairs, prime factorization, and divisibility notes.
Factors of 12
1, 2, 3, 4, 6, 12
Factor pairs of 12
- 1 × 12
- 2 × 6
- 3 × 4
Prime factorization of 12
12 = 2² × 3
Number facts
- 12 is a composite number.
- 12 has 6 factors.
- 12 is not a perfect square.
- The sum of all factors of 12 is 28.
Divisibility rules that apply to 12
- 12 is divisible by 2 because it ends in an even digit (0, 2, 4, 6, or 8).
- 12 is divisible by 3 because the sum of its digits (3) is divisible by 3.
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How the factors of 12 are calculated
To find the factors of 12, every whole number from 1 up to the square root of 12(about 3.46) is tested for even division. 12 is even, and it divides evenly by 2, 3, 4, 6. Written as a product of primes, 12 = 2² × 3, which confirms every factor above is a combination of those prime building blocks.
Frequently asked questions about 12
How many factors does 12 have?
12 has 6 factors: 1, 2, 3, 4, 6, 12.
Is 12 a prime number?
No. 12 is composite because it has factors other than 1 and itself.
What are the factor pairs of 12?
The factor pairs of 12 are 1 × 12, 2 × 6, 3 × 4.
What is the prime factorization of 12?
The prime factorization of 12 is 2² × 3.