Q: What are the prime factors of the number 111,208,832?

 A: 2, 7, 17, 149

Why are those the prime factors of the number 111,208,832?

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 111,208,832

111,208,832
Factor Arrows
255,604,416
Factor Arrows
227,802,208
Factor Arrows
213,901,104
Factor Arrows
26,950,552
Factor Arrows
23,475,276
Factor Arrows
21,737,638
Factor Arrows
2868,819
Factor Arrows
7124,117
Factor Arrows
717,731
Factor Arrows
72,533
Factor Arrows
17149

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, 149

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 2 x 7 x 7 x 7 x 17 x 149 = 111,208,832

This can also be written as 27 x 73 x 171 x 1491 = 111,208,832

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


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