Q: What are the prime factors of the number 408,275,538?

 A: 2, 3, 11, 37, 15199

Why are those the prime factors of the number 408,275,538?

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 408,275,538

408,275,538
Factor Arrows
2204,137,769
Factor Arrows
368,045,923
Factor Arrows
116,185,993
Factor Arrows
11562,363
Factor Arrows
3715,199

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, 11, 37, 15199

We can check our work by multiplying all of the prime factors together: 2 x 3 x 11 x 11 x 37 x 15,199 = 408,275,538

This can also be written as 21 x 31 x 112 x 371 x 15,1991 = 408,275,538

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


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