Factors of 243
The factors of 243 are 1, 3, 9, 27, 81, 243. It has 6 factors.
Factors of 243
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 243 is a whole number that divides it with nothing left over. You only need to test the numbers up to √243 ≈ 15.59; 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.
- 4
Add all the factors: 1 + 3 + 9 + 27 + 81 + 243 = 364. Without 243 itself that is 121, so 243 is a deficient number.
LaTeX source of the formulas on this page
\[ 243 = 3^{5} \]Factor pairs of 243
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 243 | 1 × 243 = 243 |
| 3 | 81 | 3 × 81 = 243 |
| 9 | 27 | 9 × 27 = 243 |
Questions
What are the factors of 243?
The factors of 243 are 1, 3, 9, 27, 81, 243. It has 6 factors.
What are the prime factors of 243?
3. As a product: .
How many factors does 243 have?
243 has 6 factors (3 factor pairs).
What is the sum of the factors of 243?
364.
Is 243 a prime number?
No. It is divisible by 3, so 243 = 3 × 81.