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Prime Factors Calculator

By using our online calculator to find the prime factors of any composite number and check if a number is prime or composite. This tool also draws the prime factor tree if the number is factorable and smaller than 16000.

Prime Factors Calculator

Enter a natural number to get its prime factors:
Ex.: 4, 8, 9, 26, 128, etc.
This calculator accepts numbers up to 10,000,000,000 (10 billion)
The number 2 is a prime number, because 2 is only divided by one and by itself.

Other calculators related to prime numbers:

What is prime number? How to factorize a number?

Watch this video below to learn more on prime numbers, prime factors and how you can draw a factor tree.

You can also find this video about factorization at mathantics.com


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Sample Factorizations