Q: What are the prime factors of the number 39,408,160?

 A: 2, 5, 11, 22391

Why are those the prime factors of the number 39,408,160?

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 39,408,160

39,408,160
Factor Arrows
219,704,080
Factor Arrows
29,852,040
Factor Arrows
24,926,020
Factor Arrows
22,463,010
Factor Arrows
21,231,505
Factor Arrows
5246,301
Factor Arrows
1122,391

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, 11, 22391

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 11 x 22,391 = 39,408,160

This can also be written as 25 x 51 x 111 x 22,3911 = 39,408,160

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


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