Q: What are the prime factors of the number 165,151,520?

 A: 2, 5, 29, 35593

Why are those the prime factors of the number 165,151,520?

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 165,151,520

165,151,520
Factor Arrows
282,575,760
Factor Arrows
241,287,880
Factor Arrows
220,643,940
Factor Arrows
210,321,970
Factor Arrows
25,160,985
Factor Arrows
51,032,197
Factor Arrows
2935,593

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, 29, 35593

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 29 x 35,593 = 165,151,520

This can also be written as 25 x 51 x 291 x 35,5931 = 165,151,520

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


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