Factors of 85

The factors of 85 are 1, 5, 17, 85. It has 4 factors.

Factors of 85

Pick any whole number from 1 to 10,000.

85 = 5 \times 17

How to work it out

1
A factor of 85 is a whole number that divides it with nothing left over. You only need to test the numbers up to √85 ≈ 9.22; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 4 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$85 = 5 \times 17$
4
Add all the factors: 1 + 5 + 17 + 85 = 108. Without 85 itself that is 23, so 85 is a deficient number.

LaTeX source of the formulas on this page

\[ 85 = 5 \times 17 \]

Factor	Pairs with	Product
1	85	1 × 85 = 85
5	17	5 × 17 = 85

What are the factors of 85?

The factors of 85 are 1, 5, 17, 85. It has 4 factors.

What are the prime factors of 85?

5, 17. As a product: 5 × 17.

How many factors does 85 have?

85 has 4 factors (2 factor pairs).

What is the sum of the factors of 85?

108.

Is 85 a prime number?

No. It is divisible by 5, so 85 = 5 × 17.