Q: What are the prime factors of the number 111,141,120?

 A: 2, 3, 5, 103, 281

Why are those the prime factors of the number 111,141,120?

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 111,141,120

111,141,120
Factor Arrows
255,570,560
Factor Arrows
227,785,280
Factor Arrows
213,892,640
Factor Arrows
26,946,320
Factor Arrows
23,473,160
Factor Arrows
21,736,580
Factor Arrows
2868,290
Factor Arrows
2434,145
Factor Arrows
3144,715
Factor Arrows
528,943
Factor Arrows
103281

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, 103, 281

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 2 x 3 x 5 x 103 x 281 = 111,141,120

This can also be written as 28 x 31 x 51 x 1031 x 2811 = 111,141,120

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


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