Q: What are the prime factors of the number 490,560?

 A: 2, 3, 5, 7, 73

Why are those the prime factors of the number 490,560?

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 490,560

490,560
Factor Arrows
2245,280
Factor Arrows
2122,640
Factor Arrows
261,320
Factor Arrows
230,660
Factor Arrows
215,330
Factor Arrows
27,665
Factor Arrows
32,555
Factor Arrows
5511
Factor Arrows
773

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, 73

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 5 x 7 x 73 = 490,560

This can also be written as 26 x 31 x 51 x 71 x 731 = 490,560

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


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