Q: What are the prime factors of the number 490,644?

 A: 2, 3, 7, 11, 59

Why are those the prime factors of the number 490,644?

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 490,644

490,644
Factor Arrows
2245,322
Factor Arrows
2122,661
Factor Arrows
340,887
Factor Arrows
313,629
Factor Arrows
34,543
Factor Arrows
7649
Factor Arrows
1159

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, 7, 11, 59

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 7 x 11 x 59 = 490,644

This can also be written as 22 x 33 x 71 x 111 x 591 = 490,644

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


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