Q: What are the prime factors of the number 407,900?

 A: 2, 5, 4079

Why are those the prime factors of the number 407,900?

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 407,900

407,900
Factor Arrows
2203,950
Factor Arrows
2101,975
Factor Arrows
520,395
Factor Arrows
54,079

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, 4079

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 4,079 = 407,900

This can also be written as 22 x 52 x 4,0791 = 407,900

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


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