Q: What are the prime factors of the number 40,008,704?

 A: 2, 89, 439

Why are those the prime factors of the number 40,008,704?

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 40,008,704

40,008,704
Factor Arrows
220,004,352
Factor Arrows
210,002,176
Factor Arrows
25,001,088
Factor Arrows
22,500,544
Factor Arrows
21,250,272
Factor Arrows
2625,136
Factor Arrows
2312,568
Factor Arrows
2156,284
Factor Arrows
278,142
Factor Arrows
239,071
Factor Arrows
89439

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, 89, 439

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 2 x 2 x 89 x 439 = 40,008,704

This can also be written as 210 x 891 x 4391 = 40,008,704

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


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