Q: What are the prime factors of the number 124,315,200?

 A: 2, 3, 5, 89, 97

Why are those the prime factors of the number 124,315,200?

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 124,315,200

124,315,200
Factor Arrows
262,157,600
Factor Arrows
231,078,800
Factor Arrows
215,539,400
Factor Arrows
27,769,700
Factor Arrows
23,884,850
Factor Arrows
21,942,425
Factor Arrows
3647,475
Factor Arrows
3215,825
Factor Arrows
543,165
Factor Arrows
58,633
Factor Arrows
8997

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, 89, 97

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 3 x 3 x 5 x 5 x 89 x 97 = 124,315,200

This can also be written as 26 x 32 x 52 x 891 x 971 = 124,315,200

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


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