Q: What are the prime factors of the number 68,928?

 A: 2, 3, 359

Why are those the prime factors of the number 68,928?

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 68,928

68,928
Factor Arrows
234,464
Factor Arrows
217,232
Factor Arrows
28,616
Factor Arrows
24,308
Factor Arrows
22,154
Factor Arrows
21,077
Factor Arrows
3359

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, 359

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 3 x 359 = 68,928

This can also be written as 26 x 31 x 3591 = 68,928

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


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