Q: What are the prime factors of the number 115,235,120?

 A: 2, 5, 7, 11, 13, 1439

Why are those the prime factors of the number 115,235,120?

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 115,235,120

115,235,120
Factor Arrows
257,617,560
Factor Arrows
228,808,780
Factor Arrows
214,404,390
Factor Arrows
27,202,195
Factor Arrows
51,440,439
Factor Arrows
7205,777
Factor Arrows
1118,707
Factor Arrows
131,439

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, 11, 13, 1439

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 7 x 11 x 13 x 1,439 = 115,235,120

This can also be written as 24 x 51 x 71 x 111 x 131 x 1,4391 = 115,235,120

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


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