Q: What are the prime factors of the number 905,177?

 A: 7, 13, 29

Why are those the prime factors of the number 905,177?

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 905,177

905,177
Factor Arrows
7129,311
Factor Arrows
718,473
Factor Arrows
72,639
Factor Arrows
7377
Factor Arrows
1329

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:

7, 13, 29

We can check our work by multiplying all of the prime factors together: 7 x 7 x 7 x 7 x 13 x 29 = 905,177

This can also be written as 74 x 131 x 291 = 905,177

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


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