Q: What are the prime factors of the number 115,415,500?

 A: 2, 5, 19, 12149

Why are those the prime factors of the number 115,415,500?

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 115,415,500

115,415,500
Factor Arrows
257,707,750
Factor Arrows
228,853,875
Factor Arrows
55,770,775
Factor Arrows
51,154,155
Factor Arrows
5230,831
Factor Arrows
1912,149

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, 19, 12149

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 5 x 19 x 12,149 = 115,415,500

This can also be written as 22 x 53 x 191 x 12,1491 = 115,415,500

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


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