Q: What are the prime factors of the number 132,021,120?

 A: 2, 3, 5, 7, 11, 19, 47

Why are those the prime factors of the number 132,021,120?

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 132,021,120

132,021,120
Factor Arrows
266,010,560
Factor Arrows
233,005,280
Factor Arrows
216,502,640
Factor Arrows
28,251,320
Factor Arrows
24,125,660
Factor Arrows
22,062,830
Factor Arrows
21,031,415
Factor Arrows
3343,805
Factor Arrows
568,761
Factor Arrows
79,823
Factor Arrows
11893
Factor Arrows
1947

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, 11, 19, 47

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 3 x 5 x 7 x 11 x 19 x 47 = 132,021,120

This can also be written as 27 x 31 x 51 x 71 x 111 x 191 x 471 = 132,021,120

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


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