Q: What are the prime factors of the number 111,500,144?

 A: 2, 7, 17, 157, 373

Why are those the prime factors of the number 111,500,144?

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 111,500,144

111,500,144
Factor Arrows
255,750,072
Factor Arrows
227,875,036
Factor Arrows
213,937,518
Factor Arrows
26,968,759
Factor Arrows
7995,537
Factor Arrows
1758,561
Factor Arrows
157373

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, 7, 17, 157, 373

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 7 x 17 x 157 x 373 = 111,500,144

This can also be written as 24 x 71 x 171 x 1571 x 3731 = 111,500,144

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


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