Q: What are the prime factors of the number 74,406,735?

 A: 3, 5, 13, 42397

Why are those the prime factors of the number 74,406,735?

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 74,406,735

74,406,735
Factor Arrows
324,802,245
Factor Arrows
38,267,415
Factor Arrows
32,755,805
Factor Arrows
5551,161
Factor Arrows
1342,397

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:

3, 5, 13, 42397

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 5 x 13 x 42,397 = 74,406,735

This can also be written as 33 x 51 x 131 x 42,3971 = 74,406,735

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


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