Q: What are the prime factors of the number 642,950?

 A: 2, 5, 7, 11, 167

Why are those the prime factors of the number 642,950?

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 642,950

642,950
Factor Arrows
2321,475
Factor Arrows
564,295
Factor Arrows
512,859
Factor Arrows
71,837
Factor Arrows
11167

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, 7, 11, 167

We can check our work by multiplying all of the prime factors together: 2 x 5 x 5 x 7 x 11 x 167 = 642,950

This can also be written as 21 x 52 x 71 x 111 x 1671 = 642,950

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


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