Q: What are the prime factors of the number 2,187,008?

 A: 2, 8543

Why are those the prime factors of the number 2,187,008?

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 2,187,008

2,187,008
Factor Arrows
21,093,504
Factor Arrows
2546,752
Factor Arrows
2273,376
Factor Arrows
2136,688
Factor Arrows
268,344
Factor Arrows
234,172
Factor Arrows
217,086
Factor Arrows
28,543

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, 8543

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 2 x 2 x 8,543 = 2,187,008

This can also be written as 28 x 8,5431 = 2,187,008

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


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