Q: What are the prime factors of the number 125,454,420?

 A: 2, 3, 5, 7, 13, 23, 37

Why are those the prime factors of the number 125,454,420?

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 125,454,420

125,454,420
Factor Arrows
262,727,210
Factor Arrows
231,363,605
Factor Arrows
310,454,535
Factor Arrows
33,484,845
Factor Arrows
31,161,615
Factor Arrows
3387,205
Factor Arrows
577,441
Factor Arrows
711,063
Factor Arrows
13851
Factor Arrows
2337

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, 13, 23, 37

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 5 x 7 x 13 x 23 x 37 = 125,454,420

This can also be written as 22 x 34 x 51 x 71 x 131 x 231 x 371 = 125,454,420

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


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