Q: What are the prime factors of the number 166,149,984?

 A: 2, 3, 7, 11, 13, 19

Why are those the prime factors of the number 166,149,984?

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 166,149,984

166,149,984
Factor Arrows
283,074,992
Factor Arrows
241,537,496
Factor Arrows
220,768,748
Factor Arrows
210,384,374
Factor Arrows
25,192,187
Factor Arrows
31,730,729
Factor Arrows
7247,247
Factor Arrows
735,321
Factor Arrows
113,211
Factor Arrows
13247
Factor Arrows
1319

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, 11, 13, 19

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 11 x 13 x 13 x 19 = 166,149,984

This can also be written as 25 x 31 x 72 x 111 x 132 x 191 = 166,149,984

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


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