Q: What are the prime factors of the number 124,302,400?

 A: 2, 5, 77689

Why are those the prime factors of the number 124,302,400?

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 124,302,400

124,302,400
Factor Arrows
262,151,200
Factor Arrows
231,075,600
Factor Arrows
215,537,800
Factor Arrows
27,768,900
Factor Arrows
23,884,450
Factor Arrows
21,942,225
Factor Arrows
5388,445
Factor Arrows
577,689

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, 5, 77689

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 5 x 5 x 77,689 = 124,302,400

This can also be written as 26 x 52 x 77,6891 = 124,302,400

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


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