Q: What are the prime factors of the number 166,506,165?

 A: 3, 5, 7, 25171

Why are those the prime factors of the number 166,506,165?

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 166,506,165

166,506,165
Factor Arrows
355,502,055
Factor Arrows
318,500,685
Factor Arrows
36,166,895
Factor Arrows
51,233,379
Factor Arrows
7176,197
Factor Arrows
725,171

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:

3, 5, 7, 25171

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 5 x 7 x 7 x 25,171 = 166,506,165

This can also be written as 33 x 51 x 72 x 25,1711 = 166,506,165

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


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