Q: What are the prime factors of the number 111,144,120?

 A: 2, 3, 5, 397, 2333

Why are those the prime factors of the number 111,144,120?

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 111,144,120

111,144,120
Factor Arrows
255,572,060
Factor Arrows
227,786,030
Factor Arrows
213,893,015
Factor Arrows
34,631,005
Factor Arrows
5926,201
Factor Arrows
3972,333

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, 3, 5, 397, 2333

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 397 x 2,333 = 111,144,120

This can also be written as 23 x 31 x 51 x 3971 x 2,3331 = 111,144,120

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


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