Q: What are the prime factors of the number 108,205,110?

 A: 2, 3, 5, 13, 23, 4021

Why are those the prime factors of the number 108,205,110?

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 108,205,110

108,205,110
Factor Arrows
254,102,555
Factor Arrows
318,034,185
Factor Arrows
36,011,395
Factor Arrows
51,202,279
Factor Arrows
1392,483
Factor Arrows
234,021

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, 13, 23, 4021

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 13 x 23 x 4,021 = 108,205,110

This can also be written as 21 x 32 x 51 x 131 x 231 x 4,0211 = 108,205,110

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


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