Factors of 729
The factors of 729 are 1, 3, 9, 27, 81, 243, 729. It has 7 factors.
Factors of 729
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 729 is a whole number that divides it with nothing left over. You only need to test the numbers up to √729 ≈ 27.00; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 7 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 3 + 9 + 27 + 81 + 243 + 729 = 1093. Without 729 itself that is 364, so 729 is a deficient number.
LaTeX source of the formulas on this page
\[ 729 = 3^{6} \]Factor pairs of 729
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 729 | 1 × 729 = 729 |
| 3 | 243 | 3 × 243 = 729 |
| 9 | 81 | 9 × 81 = 729 |
| 27 | 27 | 27 × 27 = 729 |
Questions
What are the factors of 729?
The factors of 729 are 1, 3, 9, 27, 81, 243, 729. It has 7 factors.
What are the prime factors of 729?
3. As a product: .
How many factors does 729 have?
729 has 7 factors (4 factor pairs, one of them 27 × 27).
What is the sum of the factors of 729?
1093.
Is 729 a prime number?
No. It is divisible by 3, so 729 = 3 × 243.