Factors of 80
There are 10 factors of 80 — the full list is below, with factor pairs, prime factorization, and divisibility notes.
Factors of 80
1, 2, 4, 5, 8, 10, 16, 20, 40, 80
Factor pairs of 80
- 1 × 80
- 2 × 40
- 4 × 20
- 5 × 16
- 8 × 10
Prime factorization of 80
80 = 2⁴ × 5
Number facts
- 80 is a composite number.
- 80 has 10 factors.
- 80 is not a perfect square.
- The sum of all factors of 80 is 186.
Divisibility rules that apply to 80
- 80 is divisible by 2 because it ends in an even digit (0, 2, 4, 6, or 8).
- 80 is divisible by 5 because it ends in 0 or 5.
- 80 is divisible by 10 because it ends in 0.
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How the factors of 80 are calculated
To find the factors of 80, every whole number from 1 up to the square root of 80(about 8.94) is tested for even division. 80 is even, and it divides evenly by 2, 4, 5, 8, among others. Written as a product of primes, 80 = 2⁴ × 5, which confirms every factor above is a combination of those prime building blocks.
Frequently asked questions about 80
How many factors does 80 have?
80 has 10 factors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80.
Is 80 a prime number?
No. 80 is composite because it has factors other than 1 and itself.
What are the factor pairs of 80?
The factor pairs of 80 are 1 × 80, 2 × 40, 4 × 20, 5 × 16, 8 × 10.
What is the prime factorization of 80?
The prime factorization of 80 is 2⁴ × 5.