Q: What are the prime factors of the number 123,112,000?

 A: 2, 5, 11, 1399

Why are those the prime factors of the number 123,112,000?

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 123,112,000

123,112,000
Factor Arrows
261,556,000
Factor Arrows
230,778,000
Factor Arrows
215,389,000
Factor Arrows
27,694,500
Factor Arrows
23,847,250
Factor Arrows
21,923,625
Factor Arrows
5384,725
Factor Arrows
576,945
Factor Arrows
515,389
Factor Arrows
111,399

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, 11, 1399

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 5 x 5 x 5 x 11 x 1,399 = 123,112,000

This can also be written as 26 x 53 x 111 x 1,3991 = 123,112,000

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


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