Q: What are the prime factors of the number 77,508?

 A: 2, 3, 2153

Why are those the prime factors of the number 77,508?

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 77,508

77,508
Factor Arrows
238,754
Factor Arrows
219,377
Factor Arrows
36,459
Factor Arrows
32,153

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, 2153

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 2,153 = 77,508

This can also be written as 22 x 32 x 2,1531 = 77,508

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


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