Q: What are the prime factors of the number 120,323,200?

 A: 2, 5, 19, 1979

Why are those the prime factors of the number 120,323,200?

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 120,323,200

120,323,200
Factor Arrows
260,161,600
Factor Arrows
230,080,800
Factor Arrows
215,040,400
Factor Arrows
27,520,200
Factor Arrows
23,760,100
Factor Arrows
21,880,050
Factor Arrows
2940,025
Factor Arrows
5188,005
Factor Arrows
537,601
Factor Arrows
191,979

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, 19, 1979

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 5 x 19 x 1,979 = 120,323,200

This can also be written as 27 x 52 x 191 x 1,9791 = 120,323,200

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


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