Factors of 8
There are 4 factors of 8 — the full list is below, with factor pairs, prime factorization, and divisibility notes.
Factors of 8
1, 2, 4, 8
Factor pairs of 8
- 1 × 8
- 2 × 4
Prime factorization of 8
8 = 2³
Number facts
- 8 is a composite number.
- 8 has 4 factors.
- 8 is not a perfect square.
- The sum of all factors of 8 is 15.
Divisibility rules that apply to 8
- 8 is divisible by 2 because it ends in an even digit (0, 2, 4, 6, or 8).
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How the factors of 8 are calculated
To find the factors of 8, every whole number from 1 up to the square root of 8(about 2.83) is tested for even division. 8 is even, and it divides evenly by 2, 4. Written as a product of primes, 8 = 2³.
Frequently asked questions about 8
How many factors does 8 have?
8 has 4 factors: 1, 2, 4, 8.
Is 8 a prime number?
No. 8 is composite because it has factors other than 1 and itself.
What are the factor pairs of 8?
The factor pairs of 8 are 1 × 8, 2 × 4.
What is the prime factorization of 8?
The prime factorization of 8 is 2³.