Question
What are factors of a number?
Factors are whole numbers that divide another number evenly with no remainder.
Math
Use OmniCalc's factor calculator to list every whole-number factor of a number and see the factor pairs that build it.
Factor calculator
Enter a whole number to see all of its factors, the factor pairs that build it, and whether it behaves like a prime number.
Why this result matters
A fast number-factor tool that supports divisibility checks, prime detection, and factor-pair work. Use the tool above to enter a few clear inputs and get a practical answer you can use right away.
This factor calculator helps students and everyday users list all factors of a number quickly without trial-and-error division. It is useful for divisibility checks, prime-number detection, common-factor work, and understanding how a number can be rebuilt from whole-number pairs.
Formula and method
The calculator checks positive divisors up to the square root of the number, records each exact divisor, adds its matching factor pair, then sorts the full factor list to show every whole-number factor cleanly.
Example
If you enter 36, the calculator shows factors of 1, 2, 3, 4, 6, 9, 12, 18, and 36, along with factor pairs like 4 × 9 and 6 × 6.
FAQ
Short answers to the questions people often ask before or after using the tool.
Question
Factors are whole numbers that divide another number evenly with no remainder.
Question
A factor pair is a pair of whole numbers that multiply together to make the original number.
Question
A number is prime when it has exactly two positive factors: 1 and itself.
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