Q: What are the prime factors of the number 8,169,312?

 A: 2, 3, 43, 1979

Why are those the prime factors of the number 8,169,312?

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 8,169,312

8,169,312
Factor Arrows
24,084,656
Factor Arrows
22,042,328
Factor Arrows
21,021,164
Factor Arrows
2510,582
Factor Arrows
2255,291
Factor Arrows
385,097
Factor Arrows
431,979

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, 43, 1979

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 43 x 1,979 = 8,169,312

This can also be written as 25 x 31 x 431 x 1,9791 = 8,169,312

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


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