Q: What are the prime factors of the number 115,273,125?

 A: 3, 5, 11, 23

Why are those the prime factors of the number 115,273,125?

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 115,273,125

115,273,125
Factor Arrows
338,424,375
Factor Arrows
312,808,125
Factor Arrows
34,269,375
Factor Arrows
31,423,125
Factor Arrows
3474,375
Factor Arrows
3158,125
Factor Arrows
531,625
Factor Arrows
56,325
Factor Arrows
51,265
Factor Arrows
5253
Factor Arrows
1123

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:

3, 5, 11, 23

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 3 x 3 x 5 x 5 x 5 x 5 x 11 x 23 = 115,273,125

This can also be written as 36 x 54 x 111 x 231 = 115,273,125

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


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