Q: What are the prime factors of the number 15,108,800?

 A: 2, 5, 7, 19, 71

Why are those the prime factors of the number 15,108,800?

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 15,108,800

15,108,800
Factor Arrows
27,554,400
Factor Arrows
23,777,200
Factor Arrows
21,888,600
Factor Arrows
2944,300
Factor Arrows
2472,150
Factor Arrows
2236,075
Factor Arrows
547,215
Factor Arrows
59,443
Factor Arrows
71,349
Factor Arrows
1971

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, 5, 7, 19, 71

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 5 x 5 x 7 x 19 x 71 = 15,108,800

This can also be written as 26 x 52 x 71 x 191 x 711 = 15,108,800

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


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