Q: What are the prime factors of the number 165,115,040?

 A: 2, 5, 59, 17491

Why are those the prime factors of the number 165,115,040?

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 165,115,040

165,115,040
Factor Arrows
282,557,520
Factor Arrows
241,278,760
Factor Arrows
220,639,380
Factor Arrows
210,319,690
Factor Arrows
25,159,845
Factor Arrows
51,031,969
Factor Arrows
5917,491

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, 59, 17491

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 59 x 17,491 = 165,115,040

This can also be written as 25 x 51 x 591 x 17,4911 = 165,115,040

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


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