Q: What are the prime factors of the number 100,080?

 A: 2, 3, 5, 139

Why are those the prime factors of the number 100,080?

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 100,080

100,080
Factor Arrows
250,040
Factor Arrows
225,020
Factor Arrows
212,510
Factor Arrows
26,255
Factor Arrows
32,085
Factor Arrows
3695
Factor Arrows
5139

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, 3, 5, 139

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 5 x 139 = 100,080

This can also be written as 24 x 32 x 51 x 1391 = 100,080

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


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