Factors of 423

3, 47. As a product: 3^2 × 47.

The factors of 423 are 1, 3, 9, 47, 141, 423. It has 6 factors.

Factors of 423

Pick any whole number from 1 to 10,000.

423 = 3^{2} \times 47

How to work it out

1
A factor of 423 is a whole number that divides it with nothing left over. You only need to test the numbers up to √423 ≈ 20.57; 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.
$423 = 3^{2} \times 47$
4
Add all the factors: 1 + 3 + 9 + 47 + 141 + 423 = 624. Without 423 itself that is 201, so 423 is a deficient number.

LaTeX source of the formulas on this page

\[ 423 = 3^{2} \times 47 \]

What are the factors of 423?

The factors of 423 are 1, 3, 9, 47, 141, 423. It has 6 factors.

What are the prime factors of 423?

3, 47. As a product: $3^{2}$ × 47.

How many factors does 423 have?

423 has 6 factors (3 factor pairs).

What is the sum of the factors of 423?

624.

Is 423 a prime number?

No. It is divisible by 3, so 423 = 3 × 141.