Q: What are the prime factors of the number 68,992?

 A: 2, 7, 11

Why are those the prime factors of the number 68,992?

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 68,992

68,992
Factor Arrows
234,496
Factor Arrows
217,248
Factor Arrows
28,624
Factor Arrows
24,312
Factor Arrows
22,156
Factor Arrows
21,078
Factor Arrows
2539
Factor Arrows
777
Factor Arrows
711

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

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 7 x 11 = 68,992

This can also be written as 27 x 72 x 111 = 68,992

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


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