Q: What are the prime factors of the number 40,565,616?

 A: 2, 3, 7, 13, 37, 251

Why are those the prime factors of the number 40,565,616?

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 40,565,616

40,565,616
Factor Arrows
220,282,808
Factor Arrows
210,141,404
Factor Arrows
25,070,702
Factor Arrows
22,535,351
Factor Arrows
3845,117
Factor Arrows
7120,731
Factor Arrows
139,287
Factor Arrows
37251

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, 7, 13, 37, 251

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 7 x 13 x 37 x 251 = 40,565,616

This can also be written as 24 x 31 x 71 x 131 x 371 x 2511 = 40,565,616

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


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