Q: What are the prime factors of the number 40,240,512?

 A: 2, 3, 13, 2687

Why are those the prime factors of the number 40,240,512?

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 40,240,512

40,240,512
Factor Arrows
220,120,256
Factor Arrows
210,060,128
Factor Arrows
25,030,064
Factor Arrows
22,515,032
Factor Arrows
21,257,516
Factor Arrows
2628,758
Factor Arrows
2314,379
Factor Arrows
3104,793
Factor Arrows
334,931
Factor Arrows
132,687

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, 13, 2687

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 3 x 3 x 13 x 2,687 = 40,240,512

This can also be written as 27 x 32 x 131 x 2,6871 = 40,240,512

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


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