Q: What are the prime factors of the number 91,173,075?

 A: 3, 5, 7, 24809

Why are those the prime factors of the number 91,173,075?

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 91,173,075

91,173,075
Factor Arrows
330,391,025
Factor Arrows
56,078,205
Factor Arrows
51,215,641
Factor Arrows
7173,663
Factor Arrows
724,809

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, 7, 24809

We can check our work by multiplying all of the prime factors together: 3 x 5 x 5 x 7 x 7 x 24,809 = 91,173,075

This can also be written as 31 x 52 x 72 x 24,8091 = 91,173,075

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


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