Q: What are the prime factors of the number 125,117,824?

 A: 2, 13, 17, 4423

Why are those the prime factors of the number 125,117,824?

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 125,117,824

125,117,824
Factor Arrows
262,558,912
Factor Arrows
231,279,456
Factor Arrows
215,639,728
Factor Arrows
27,819,864
Factor Arrows
23,909,932
Factor Arrows
21,954,966
Factor Arrows
2977,483
Factor Arrows
1375,191
Factor Arrows
174,423

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, 13, 17, 4423

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 13 x 17 x 4,423 = 125,117,824

This can also be written as 27 x 131 x 171 x 4,4231 = 125,117,824

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


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