Q: What are the prime factors of the number 133,422,120?

 A: 2, 3, 5, 13, 17, 43

Why are those the prime factors of the number 133,422,120?

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 133,422,120

133,422,120
Factor Arrows
266,711,060
Factor Arrows
233,355,530
Factor Arrows
216,677,765
Factor Arrows
35,559,255
Factor Arrows
31,853,085
Factor Arrows
3617,695
Factor Arrows
5123,539
Factor Arrows
139,503
Factor Arrows
13731
Factor Arrows
1743

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, 13, 17, 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 13 x 13 x 17 x 43 = 133,422,120

This can also be written as 23 x 33 x 51 x 132 x 171 x 431 = 133,422,120

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


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