Q: What are the prime factors of the number 100,220,032?

 A: 2, 11, 17, 53, 79

Why are those the prime factors of the number 100,220,032?

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 100,220,032

100,220,032
Factor Arrows
250,110,016
Factor Arrows
225,055,008
Factor Arrows
212,527,504
Factor Arrows
26,263,752
Factor Arrows
23,131,876
Factor Arrows
21,565,938
Factor Arrows
2782,969
Factor Arrows
1171,179
Factor Arrows
174,187
Factor Arrows
5379

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, 11, 17, 53, 79

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 11 x 17 x 53 x 79 = 100,220,032

This can also be written as 27 x 111 x 171 x 531 x 791 = 100,220,032

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


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