Q: What are the prime factors of the number 8,104,640?

 A: 2, 5, 19, 31, 43

Why are those the prime factors of the number 8,104,640?

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 8,104,640

8,104,640
Factor Arrows
24,052,320
Factor Arrows
22,026,160
Factor Arrows
21,013,080
Factor Arrows
2506,540
Factor Arrows
2253,270
Factor Arrows
2126,635
Factor Arrows
525,327
Factor Arrows
191,333
Factor Arrows
3143

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, 19, 31, 43

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 19 x 31 x 43 = 8,104,640

This can also be written as 26 x 51 x 191 x 311 x 431 = 8,104,640

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


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