Q: What are the prime factors of the number 311,324,400?

 A: 2, 3, 5, 17, 5087

Why are those the prime factors of the number 311,324,400?

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 311,324,400

311,324,400
Factor Arrows
2155,662,200
Factor Arrows
277,831,100
Factor Arrows
238,915,550
Factor Arrows
219,457,775
Factor Arrows
36,485,925
Factor Arrows
32,161,975
Factor Arrows
5432,395
Factor Arrows
586,479
Factor Arrows
175,087

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, 5087

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 5 x 5 x 17 x 5,087 = 311,324,400

This can also be written as 24 x 32 x 52 x 171 x 5,0871 = 311,324,400

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


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