Q: What are the prime factors of the number 111,201,216?

 A: 2, 3, 7, 17, 31, 157

Why are those the prime factors of the number 111,201,216?

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 111,201,216

111,201,216
Factor Arrows
255,600,608
Factor Arrows
227,800,304
Factor Arrows
213,900,152
Factor Arrows
26,950,076
Factor Arrows
23,475,038
Factor Arrows
21,737,519
Factor Arrows
3579,173
Factor Arrows
782,739
Factor Arrows
174,867
Factor Arrows
31157

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, 7, 17, 31, 157

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 3 x 7 x 17 x 31 x 157 = 111,201,216

This can also be written as 26 x 31 x 71 x 171 x 311 x 1571 = 111,201,216

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


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