Q: What are the prime factors of the number 2,166,080?

 A: 2, 5, 7, 967

Why are those the prime factors of the number 2,166,080?

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 2,166,080

2,166,080
Factor Arrows
21,083,040
Factor Arrows
2541,520
Factor Arrows
2270,760
Factor Arrows
2135,380
Factor Arrows
267,690
Factor Arrows
233,845
Factor Arrows
56,769
Factor Arrows
7967

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, 5, 7, 967

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 5 x 7 x 967 = 2,166,080

This can also be written as 26 x 51 x 71 x 9671 = 2,166,080

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


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