Q: What are the prime factors of the number 40,789,656?

 A: 2, 3, 19, 3313

Why are those the prime factors of the number 40,789,656?

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 40,789,656

40,789,656
Factor Arrows
220,394,828
Factor Arrows
210,197,414
Factor Arrows
25,098,707
Factor Arrows
31,699,569
Factor Arrows
3566,523
Factor Arrows
3188,841
Factor Arrows
362,947
Factor Arrows
193,313

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, 19, 3313

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 19 x 3,313 = 40,789,656

This can also be written as 23 x 34 x 191 x 3,3131 = 40,789,656

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


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