Q: What are the prime factors of the number 311,333,120?

 A: 2, 5, 7, 34747

Why are those the prime factors of the number 311,333,120?

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 311,333,120

311,333,120
Factor Arrows
2155,666,560
Factor Arrows
277,833,280
Factor Arrows
238,916,640
Factor Arrows
219,458,320
Factor Arrows
29,729,160
Factor Arrows
24,864,580
Factor Arrows
22,432,290
Factor Arrows
21,216,145
Factor Arrows
5243,229
Factor Arrows
734,747

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, 34747

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 5 x 7 x 34,747 = 311,333,120

This can also be written as 28 x 51 x 71 x 34,7471 = 311,333,120

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


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