Prime Factorization Calculator
One integer per line - factor it into primes with exponent form, divisor count and divisor sum
Output:
Separator:
Calculation Result
Download CSV
| No. | Original | Factorization | Exponent form | Divisors | Sum of divisors |
|---|
Introduction to the tool and how to use it
Turn integers into a product of primes, one number per line, as many lines as you like.
How to use:
1. Enter one integer per line, e.g.
2. Choose the output form (product + exponent, product only, exponent only);
3. Hit Run to get both forms together with the divisor count and divisor sum - copy it or export as CSV.
For example 360 = 2 x 2 x 2 x 3 x 3 x 5 = 2^3 x 3^2 x 5, with 24 divisors adding up to 1170.
The maths uses BigInt: primes below 1000 strip the small factors, then Miller-Rabin tests primality and Pollard rho splits what is left, so any composite up to 18 digits is factored quickly. Composites that are too long to split are skipped with a notice rather than reported wrongly.
How to use:
1. Enter one integer per line, e.g.
360;2. Choose the output form (product + exponent, product only, exponent only);
3. Hit Run to get both forms together with the divisor count and divisor sum - copy it or export as CSV.
For example 360 = 2 x 2 x 2 x 3 x 3 x 5 = 2^3 x 3^2 x 5, with 24 divisors adding up to 1170.
The maths uses BigInt: primes below 1000 strip the small factors, then Miller-Rabin tests primality and Pollard rho splits what is left, so any composite up to 18 digits is factored quickly. Composites that are too long to split are skipped with a notice rather than reported wrongly.
Factorization
Prime factorization of 720
720 = 2^4 × 3^2 × 5, which is 2 × 2 × 2 × 2 × 3 × 3 × 5 written out in full.
- Exponent form2^4 × 3^2 × 5
- Product form2 × 2 × 2 × 2 × 3 × 3 × 5
- Divisor count30
- Divisor sum2418
Divisor list
| # | Divisor | Paired divisor |
|---|---|---|
| 1 | 1 | 720 |
| 2 | 2 | 360 |
| 3 | 3 | 240 |
| 4 | 4 | 180 |
| 5 | 5 | 144 |
| 6 | 6 | 120 |
| 7 | 8 | 90 |
| 8 | 9 | 80 |
| 9 | 10 | 72 |
| 10 | 12 | 60 |
| 11 | 15 | 48 |
| 12 | 16 | 45 |
| 13 | 18 | 40 |
| 14 | 20 | 36 |
| 15 | 24 | 30 |
| 16 | 30 | 24 |
| 17 | 36 | 20 |
| 18 | 40 | 18 |
| 19 | 45 | 16 |
| 20 | 48 | 15 |
| 21 | 60 | 12 |
| 22 | 72 | 10 |
| 23 | 80 | 9 |
| 24 | 90 | 8 |
| 25 | 120 | 6 |
| 26 | 144 | 5 |
| 27 | 180 | 4 |
| 28 | 240 | 3 |
| 29 | 360 | 2 |
| 30 | 720 | 1 |
- Divisors are listed in ascending order; the paired divisor is the one it multiplies with to give the original number.
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