Q: What are the prime factors of the number 125,145,120?

 A: 2, 3, 5, 41, 6359

Why are those the prime factors of the number 125,145,120?

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 125,145,120

125,145,120
Factor Arrows
262,572,560
Factor Arrows
231,286,280
Factor Arrows
215,643,140
Factor Arrows
27,821,570
Factor Arrows
23,910,785
Factor Arrows
31,303,595
Factor Arrows
5260,719
Factor Arrows
416,359

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, 41, 6359

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 41 x 6,359 = 125,145,120

This can also be written as 25 x 31 x 51 x 411 x 6,3591 = 125,145,120

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


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