Q: What are the prime factors of the number 311,122,440?

 A: 2, 3, 5, 17, 29, 1753

Why are those the prime factors of the number 311,122,440?

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 311,122,440

311,122,440
Factor Arrows
2155,561,220
Factor Arrows
277,780,610
Factor Arrows
238,890,305
Factor Arrows
312,963,435
Factor Arrows
34,321,145
Factor Arrows
5864,229
Factor Arrows
1750,837
Factor Arrows
291,753

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, 17, 29, 1753

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 17 x 29 x 1,753 = 311,122,440

This can also be written as 23 x 32 x 51 x 171 x 291 x 1,7531 = 311,122,440

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


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