Q: What are the prime factors of the number 225,072?

 A: 2, 3, 521

Why are those the prime factors of the number 225,072?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 225,072

225,072
Factor Arrows
2112,536
Factor Arrows
256,268
Factor Arrows
228,134
Factor Arrows
214,067
Factor Arrows
34,689
Factor Arrows
31,563
Factor Arrows
3521

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 521

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 521 = 225,072

This can also be written as 24 x 33 x 5211 = 225,072

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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