Q: What are the prime factors of the number 133,045,120?

 A: 2, 5, 13, 15991

Why are those the prime factors of the number 133,045,120?

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 133,045,120

133,045,120
Factor Arrows
266,522,560
Factor Arrows
233,261,280
Factor Arrows
216,630,640
Factor Arrows
28,315,320
Factor Arrows
24,157,660
Factor Arrows
22,078,830
Factor Arrows
21,039,415
Factor Arrows
5207,883
Factor Arrows
1315,991

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, 5, 13, 15991

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 5 x 13 x 15,991 = 133,045,120

This can also be written as 27 x 51 x 131 x 15,9911 = 133,045,120

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


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