Q: What are the prime factors of the number 828,180?

 A: 2, 3, 5, 43, 107

Why are those the prime factors of the number 828,180?

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 828,180

828,180
Factor Arrows
2414,090
Factor Arrows
2207,045
Factor Arrows
369,015
Factor Arrows
323,005
Factor Arrows
54,601
Factor Arrows
43107

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, 43, 107

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 43 x 107 = 828,180

This can also be written as 22 x 32 x 51 x 431 x 1071 = 828,180

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


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