Q: What are the prime factors of the number 12,055,120?

 A: 2, 5, 7, 11, 19, 103

Why are those the prime factors of the number 12,055,120?

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 12,055,120

12,055,120
Factor Arrows
26,027,560
Factor Arrows
23,013,780
Factor Arrows
21,506,890
Factor Arrows
2753,445
Factor Arrows
5150,689
Factor Arrows
721,527
Factor Arrows
111,957
Factor Arrows
19103

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, 7, 11, 19, 103

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 7 x 11 x 19 x 103 = 12,055,120

This can also be written as 24 x 51 x 71 x 111 x 191 x 1031 = 12,055,120

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


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