Q: What are the prime factors of the number 79,968?

 A: 2, 3, 7, 17

Why are those the prime factors of the number 79,968?

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 79,968

79,968
Factor Arrows
239,984
Factor Arrows
219,992
Factor Arrows
29,996
Factor Arrows
24,998
Factor Arrows
22,499
Factor Arrows
3833
Factor Arrows
7119
Factor Arrows
717

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, 7, 17

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 7 x 7 x 17 = 79,968

This can also be written as 25 x 31 x 72 x 171 = 79,968

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


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