Q: What are the prime factors of the number 166,656?

 A: 2, 3, 7, 31

Why are those the prime factors of the number 166,656?

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 166,656

166,656
Factor Arrows
283,328
Factor Arrows
241,664
Factor Arrows
220,832
Factor Arrows
210,416
Factor Arrows
25,208
Factor Arrows
22,604
Factor Arrows
21,302
Factor Arrows
2651
Factor Arrows
3217
Factor Arrows
731

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, 31

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 2 x 3 x 7 x 31 = 166,656

This can also be written as 28 x 31 x 71 x 311 = 166,656

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


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