Q: What are the prime factors of the number 109,042,080?

 A: 2, 3, 5, 7, 17, 23, 83

Why are those the prime factors of the number 109,042,080?

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 109,042,080

109,042,080
Factor Arrows
254,521,040
Factor Arrows
227,260,520
Factor Arrows
213,630,260
Factor Arrows
26,815,130
Factor Arrows
23,407,565
Factor Arrows
31,135,855
Factor Arrows
5227,171
Factor Arrows
732,453
Factor Arrows
171,909
Factor Arrows
2383

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, 7, 17, 23, 83

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 5 x 7 x 17 x 23 x 83 = 109,042,080

This can also be written as 25 x 31 x 51 x 71 x 171 x 231 x 831 = 109,042,080

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


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