Factors of 87

The factors of 87 are 1, 3, 29, 87. It has 4 factors.

Factors of 87

Pick any whole number from 1 to 10,000.

87 = 3 \times 29

How to work it out

1
A factor of 87 is a whole number that divides it with nothing left over. You only need to test the numbers up to √87 ≈ 9.33; 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.
$87 = 3 \times 29$
4
Add all the factors: 1 + 3 + 29 + 87 = 120. Without 87 itself that is 33, so 87 is a deficient number.

LaTeX source of the formulas on this page

\[ 87 = 3 \times 29 \]

Factor	Pairs with	Product
1	87	1 × 87 = 87
3	29	3 × 29 = 87

What are the factors of 87?

The factors of 87 are 1, 3, 29, 87. It has 4 factors.

What are the prime factors of 87?

3, 29. As a product: 3 × 29.

How many factors does 87 have?

87 has 4 factors (2 factor pairs).

What is the sum of the factors of 87?

120.

Is 87 a prime number?

No. It is divisible by 3, so 87 = 3 × 29.