Find all factors, prime factors, and factor pairs of any number. Check if a number is prime.
A Factor Calculator finds all the factors of a given number, meaning every whole number that divides evenly into it without leaving a remainder.
The calculator checks numbers up to the square root of your input, testing whether each divides evenly, then lists all factor pairs.
Enter any positive whole number. Click Calculate. The tool lists all factors, whether the number is prime, and its prime factorization.
Example 1: Factors of 12 are 1, 2, 3, 4, 6, 12, six factors total.
Example 2: Factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36, nine factors total.
Example 3: Factors of 17 are just 1 and 17, since 17 is a prime number.
Simplifying fractions by finding common factors. Finding the Greatest Common Factor between numbers. Solving algebra factoring problems. Dividing items into equal groups.
What is the difference between factors and multiples. Factors divide into a number, multiples are created by multiplying it.
Is 1 a factor of every number. Yes, 1 divides evenly into every whole number.
What is prime factorization. It breaks a number into the prime numbers that multiply to create it.
Can this factor negative numbers. Most factor calculators work with positive whole numbers.
How many factors does a prime number have. Exactly two, 1 and itself.