Q: What are the prime factors of the number 643,014?

 A: 2, 3, 139, 257

Why are those the prime factors of the number 643,014?

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 643,014

643,014
Factor Arrows
2321,507
Factor Arrows
3107,169
Factor Arrows
335,723
Factor Arrows
139257

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, 3, 139, 257

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 139 x 257 = 643,014

This can also be written as 21 x 32 x 1391 x 2571 = 643,014

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


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