Factors of 189

The factors of 189 are 1, 3, 7, 9, 21, 27, 63, 189. It has 8 factors.

Factors of 189

Pick any whole number from 1 to 10,000.

189 = 3^{3} \times 7

How to work it out

1
A factor of 189 is a whole number that divides it with nothing left over. You only need to test the numbers up to √189 ≈ 13.75; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 8 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$189 = 3^{3} \times 7$
4
Add all the factors: 1 + 3 + 7 + 9 + 21 + 27 + 63 + 189 = 320. Without 189 itself that is 131, so 189 is a deficient number.

LaTeX source of the formulas on this page

\[ 189 = 3^{3} \times 7 \]

What are the factors of 189?

The factors of 189 are 1, 3, 7, 9, 21, 27, 63, 189. It has 8 factors.

What are the prime factors of 189?

3, 7. As a product: $3^{3}$ × 7.

How many factors does 189 have?

189 has 8 factors (4 factor pairs).

What is the sum of the factors of 189?

320.

Is 189 a prime number?

No. It is divisible by 3, so 189 = 3 × 63.