Q: What are the prime factors of the number 69,356,672?

 A: 2, 7, 11, 31, 227

Why are those the prime factors of the number 69,356,672?

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 69,356,672

69,356,672
Factor Arrows
234,678,336
Factor Arrows
217,339,168
Factor Arrows
28,669,584
Factor Arrows
24,334,792
Factor Arrows
22,167,396
Factor Arrows
21,083,698
Factor Arrows
2541,849
Factor Arrows
777,407
Factor Arrows
117,037
Factor Arrows
31227

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, 11, 31, 227

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 7 x 11 x 31 x 227 = 69,356,672

This can also be written as 27 x 71 x 111 x 311 x 2271 = 69,356,672

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


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