Q: What are the prime factors of the number 124,000,000?

 A: 2, 5, 31

Why are those the prime factors of the number 124,000,000?

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 124,000,000

124,000,000
Factor Arrows
262,000,000
Factor Arrows
231,000,000
Factor Arrows
215,500,000
Factor Arrows
27,750,000
Factor Arrows
23,875,000
Factor Arrows
21,937,500
Factor Arrows
2968,750
Factor Arrows
2484,375
Factor Arrows
596,875
Factor Arrows
519,375
Factor Arrows
53,875
Factor Arrows
5775
Factor Arrows
5155
Factor Arrows
531

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, 31

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 5 x 5 x 5 x 5 x 5 x 5 x 31 = 124,000,000

This can also be written as 28 x 56 x 311 = 124,000,000

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


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