Factors Calculator
Prime or composite? Enter any whole number up to 1,000,000 and this tool lists every factor, pairs them up (each pair multiplies back to your number), counts them, and tells you whether the number is prime or composite.
How to use
- Enter a positive whole number (up to 1,000,000).
- Read the factors list — every number that divides yours with no remainder.
- Check the pairs table: each row multiplies back to your number.
- If the only pair is 1 times itself, your number is prime.
Note: a factor is a number that divides the given number with no remainder. Multiplying a factor pair gives back the original number.