Q: What are the prime factors of the number 111,541,120?

 A: 2, 5, 397, 439

Why are those the prime factors of the number 111,541,120?

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 111,541,120

111,541,120
Factor Arrows
255,770,560
Factor Arrows
227,885,280
Factor Arrows
213,942,640
Factor Arrows
26,971,320
Factor Arrows
23,485,660
Factor Arrows
21,742,830
Factor Arrows
2871,415
Factor Arrows
5174,283
Factor Arrows
397439

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, 397, 439

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 2 x 5 x 397 x 439 = 111,541,120

This can also be written as 27 x 51 x 3971 x 4391 = 111,541,120

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


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