Q: What are the prime factors of the number 111,201,200?

 A: 2, 5, 11, 127, 199

Why are those the prime factors of the number 111,201,200?

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 111,201,200

111,201,200
Factor Arrows
255,600,600
Factor Arrows
227,800,300
Factor Arrows
213,900,150
Factor Arrows
26,950,075
Factor Arrows
51,390,015
Factor Arrows
5278,003
Factor Arrows
1125,273
Factor Arrows
127199

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, 127, 199

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 5 x 11 x 127 x 199 = 111,201,200

This can also be written as 24 x 52 x 111 x 1271 x 1991 = 111,201,200

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


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