Q: What are the prime factors of the number 111,502,440?

 A: 2, 3, 5, 7, 43

Why are those the prime factors of the number 111,502,440?

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 111,502,440

111,502,440
Factor Arrows
255,751,220
Factor Arrows
227,875,610
Factor Arrows
213,937,805
Factor Arrows
34,645,935
Factor Arrows
31,548,645
Factor Arrows
3516,215
Factor Arrows
5103,243
Factor Arrows
714,749
Factor Arrows
72,107
Factor Arrows
7301
Factor Arrows
743

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, 7, 43

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 5 x 7 x 7 x 7 x 7 x 43 = 111,502,440

This can also be written as 23 x 33 x 51 x 74 x 431 = 111,502,440

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


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