Quick start
- Enter one positive whole number.
- Press Find factors.
- Read the full factor list in the result card.
- Review the factor pairs, prime factorization, steps, and recent answers.
Factors and factor pairs
A factor divides a number evenly. A factor pair is two factors that multiply together to make the original number.
For 84, one factor pair is 7 and 12 because 7 x 12 = 84. The calculator checks divisors up to the square root, then adds the matching pair.
Prime factorization
Prime factorization rewrites a number as prime numbers multiplied together. The tool also groups repeated primes with exponents, such as 360 = 2^3 x 3^2 x 5.
The number 1 is not prime because a prime number needs exactly two positive factors: 1 and itself.
Examples from the calculator
1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
1, 97
2^3 x 3^2 x 5
History, privacy, and copying
Recent answers stay visible in the page while you work. The history is kept only in the current browser tab and is not sent to a server.
Copy answer copies the expression and result so you can paste it into notes, homework, a message, or another document.