Factors of 63

The factors of 63 are 1, 3, 7, 9, 21, 63. It has 6 factors.

Factors of 63

Pick any whole number from 1 to 10,000.

63 = 3^{2} \times 7

How to work it out

1
A factor of 63 is a whole number that divides it with nothing left over. You only need to test the numbers up to √63 ≈ 7.94; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 6 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$63 = 3^{2} \times 7$
4
Add all the factors: 1 + 3 + 7 + 9 + 21 + 63 = 104. Without 63 itself that is 41, so 63 is a deficient number.

LaTeX source of the formulas on this page

\[ 63 = 3^{2} \times 7 \]

What are the factors of 63?

The factors of 63 are 1, 3, 7, 9, 21, 63. It has 6 factors.

What are the prime factors of 63?

3, 7. As a product: $3^{2}$ × 7.

How many factors does 63 have?

63 has 6 factors (3 factor pairs).

What is the sum of the factors of 63?

104.

Is 63 a prime number?

No. It is divisible by 3, so 63 = 3 × 21.