Q: What are the prime factors of the number 15,101,520?

 A: 2, 3, 5, 7, 89, 101

Why are those the prime factors of the number 15,101,520?

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 15,101,520

15,101,520
Factor Arrows
27,550,760
Factor Arrows
23,775,380
Factor Arrows
21,887,690
Factor Arrows
2943,845
Factor Arrows
3314,615
Factor Arrows
562,923
Factor Arrows
78,989
Factor Arrows
89101

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, 5, 7, 89, 101

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 7 x 89 x 101 = 15,101,520

This can also be written as 24 x 31 x 51 x 71 x 891 x 1011 = 15,101,520

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


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