Q: What are the prime factors of the number 311,303,200?

 A: 2, 5, 13, 37, 809

Why are those the prime factors of the number 311,303,200?

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 311,303,200

311,303,200
Factor Arrows
2155,651,600
Factor Arrows
277,825,800
Factor Arrows
238,912,900
Factor Arrows
219,456,450
Factor Arrows
29,728,225
Factor Arrows
51,945,645
Factor Arrows
5389,129
Factor Arrows
1329,933
Factor Arrows
37809

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, 13, 37, 809

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 5 x 13 x 37 x 809 = 311,303,200

This can also be written as 25 x 52 x 131 x 371 x 8091 = 311,303,200

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


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