Q: What are the prime factors of the number 975,205?

 A: 5, 7, 11, 17, 149

Why are those the prime factors of the number 975,205?

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 975,205

975,205
Factor Arrows
5195,041
Factor Arrows
727,863
Factor Arrows
112,533
Factor Arrows
17149

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:

5, 7, 11, 17, 149

We can check our work by multiplying all of the prime factors together: 5 x 7 x 11 x 17 x 149 = 975,205

This can also be written as 51 x 71 x 111 x 171 x 1491 = 975,205

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


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