Q: What are the prime factors of the number 165,619,520?

 A: 2, 5, 11, 47051

Why are those the prime factors of the number 165,619,520?

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 165,619,520

165,619,520
Factor Arrows
282,809,760
Factor Arrows
241,404,880
Factor Arrows
220,702,440
Factor Arrows
210,351,220
Factor Arrows
25,175,610
Factor Arrows
22,587,805
Factor Arrows
5517,561
Factor Arrows
1147,051

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, 5, 11, 47051

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 5 x 11 x 47,051 = 165,619,520

This can also be written as 26 x 51 x 111 x 47,0511 = 165,619,520

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


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