Q: What are the prime factors of the number 215,280?

 A: 2, 3, 5, 13, 23

Why are those the prime factors of the number 215,280?

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 215,280

215,280
Factor Arrows
2107,640
Factor Arrows
253,820
Factor Arrows
226,910
Factor Arrows
213,455
Factor Arrows
34,485
Factor Arrows
31,495
Factor Arrows
5299
Factor Arrows
1323

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, 5, 13, 23

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 5 x 13 x 23 = 215,280

This can also be written as 24 x 32 x 51 x 131 x 231 = 215,280

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


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