Q: What are the prime factors of the number 422,518?

 A: 2, 17, 43

Why are those the prime factors of the number 422,518?

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 422,518

422,518
Factor Arrows
2211,259
Factor Arrows
1712,427
Factor Arrows
17731
Factor Arrows
1743

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, 17, 43

We can check our work by multiplying all of the prime factors together: 2 x 17 x 17 x 17 x 43 = 422,518

This can also be written as 21 x 173 x 431 = 422,518

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


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