Factors of 80

The factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, 80. It has 10 factors.

Factors of 80

Pick any whole number from 1 to 10,000.

80 = 2^{4} \times 5

How to work it out

1
A factor of 80 is a whole number that divides it with nothing left over. You only need to test the numbers up to √80 ≈ 8.94; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 10 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$80 = 2^{4} \times 5$
4
Add all the factors: 1 + 2 + 4 + 5 + 8 + 10 + 16 + 20 + 40 + 80 = 186. Without 80 itself that is 106, so 80 is an abundant number.

LaTeX source of the formulas on this page

\[ 80 = 2^{4} \times 5 \]

What are the factors of 80?

The factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, 80. It has 10 factors.

What are the prime factors of 80?

2, 5. As a product: $2^{4}$ × 5.

How many factors does 80 have?

80 has 10 factors (5 factor pairs).

What is the sum of the factors of 80?

186.

Is 80 a prime number?

No. It is divisible by 2, so 80 = 2 × 40.