Q: What are the prime factors of the number 15,071,648?

 A: 2, 29, 109, 149

Why are those the prime factors of the number 15,071,648?

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 15,071,648

15,071,648
Factor Arrows
27,535,824
Factor Arrows
23,767,912
Factor Arrows
21,883,956
Factor Arrows
2941,978
Factor Arrows
2470,989
Factor Arrows
2916,241
Factor Arrows
109149

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, 29, 109, 149

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 29 x 109 x 149 = 15,071,648

This can also be written as 25 x 291 x 1091 x 1491 = 15,071,648

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


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