Q: What are the prime factors of the number 71,664?

 A: 2, 3, 1493

Why are those the prime factors of the number 71,664?

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 71,664

71,664
Factor Arrows
235,832
Factor Arrows
217,916
Factor Arrows
28,958
Factor Arrows
24,479
Factor Arrows
31,493

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, 1493

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 1,493 = 71,664

This can also be written as 24 x 31 x 1,4931 = 71,664

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


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