Q: What are the prime factors of the number 215,152?

 A: 2, 7, 17, 113

Why are those the prime factors of the number 215,152?

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 215,152

215,152
Factor Arrows
2107,576
Factor Arrows
253,788
Factor Arrows
226,894
Factor Arrows
213,447
Factor Arrows
71,921
Factor Arrows
17113

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, 7, 17, 113

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 7 x 17 x 113 = 215,152

This can also be written as 24 x 71 x 171 x 1131 = 215,152

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


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