Q: What are the prime factors of the number 720,180?

 A: 2, 3, 5, 4001

Why are those the prime factors of the number 720,180?

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 720,180

720,180
Factor Arrows
2360,090
Factor Arrows
2180,045
Factor Arrows
360,015
Factor Arrows
320,005
Factor Arrows
54,001

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, 4001

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 4,001 = 720,180

This can also be written as 22 x 32 x 51 x 4,0011 = 720,180

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


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