Q: What are the prime factors of the number 15,744,512?

 A: 2, 7, 23, 191

Why are those the prime factors of the number 15,744,512?

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 15,744,512

15,744,512
Factor Arrows
27,872,256
Factor Arrows
23,936,128
Factor Arrows
21,968,064
Factor Arrows
2984,032
Factor Arrows
2492,016
Factor Arrows
2246,008
Factor Arrows
2123,004
Factor Arrows
261,502
Factor Arrows
230,751
Factor Arrows
74,393
Factor Arrows
23191

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, 7, 23, 191

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 7 x 23 x 191 = 15,744,512

This can also be written as 29 x 71 x 231 x 1911 = 15,744,512

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


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