Q: What are the prime factors of the number 125,231,104?

 A: 2, 15287

Why are those the prime factors of the number 125,231,104?

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 125,231,104

125,231,104
Factor Arrows
262,615,552
Factor Arrows
231,307,776
Factor Arrows
215,653,888
Factor Arrows
27,826,944
Factor Arrows
23,913,472
Factor Arrows
21,956,736
Factor Arrows
2978,368
Factor Arrows
2489,184
Factor Arrows
2244,592
Factor Arrows
2122,296
Factor Arrows
261,148
Factor Arrows
230,574
Factor Arrows
215,287

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, 15287

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 2 x 2 x 2 x 2 x 2 x 2 x 15,287 = 125,231,104

This can also be written as 213 x 15,2871 = 125,231,104

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


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