Q: What are the prime factors of the number 67,072?

 A: 2, 131

Why are those the prime factors of the number 67,072?

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 67,072

67,072
Factor Arrows
233,536
Factor Arrows
216,768
Factor Arrows
28,384
Factor Arrows
24,192
Factor Arrows
22,096
Factor Arrows
21,048
Factor Arrows
2524
Factor Arrows
2262
Factor Arrows
2131

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, 131

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 2 x 2 x 131 = 67,072

This can also be written as 29 x 1311 = 67,072

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


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