Q: What are the prime factors of the number 15,042,048?

 A: 2, 3, 7, 1399

Why are those the prime factors of the number 15,042,048?

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 15,042,048

15,042,048
Factor Arrows
27,521,024
Factor Arrows
23,760,512
Factor Arrows
21,880,256
Factor Arrows
2940,128
Factor Arrows
2470,064
Factor Arrows
2235,032
Factor Arrows
2117,516
Factor Arrows
258,758
Factor Arrows
229,379
Factor Arrows
39,793
Factor Arrows
71,399

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, 1399

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 3 x 7 x 1,399 = 15,042,048

This can also be written as 29 x 31 x 71 x 1,3991 = 15,042,048

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


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