Q: What are the prime factors of the number 502,740?

 A: 2, 3, 5, 7, 19

Why are those the prime factors of the number 502,740?

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 502,740

502,740
Factor Arrows
2251,370
Factor Arrows
2125,685
Factor Arrows
341,895
Factor Arrows
313,965
Factor Arrows
34,655
Factor Arrows
5931
Factor Arrows
7133
Factor Arrows
719

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, 5, 7, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 5 x 7 x 7 x 19 = 502,740

This can also be written as 22 x 33 x 51 x 72 x 191 = 502,740

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


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