Q: What are the prime factors of the number 165,580,136?

 A: 2, 17, 19, 139, 461

Why are those the prime factors of the number 165,580,136?

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 165,580,136

165,580,136
Factor Arrows
282,790,068
Factor Arrows
241,395,034
Factor Arrows
220,697,517
Factor Arrows
171,217,501
Factor Arrows
1964,079
Factor Arrows
139461

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, 17, 19, 139, 461

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 17 x 19 x 139 x 461 = 165,580,136

This can also be written as 23 x 171 x 191 x 1391 x 4611 = 165,580,136

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


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