Q: What are the prime factors of the number 311,030,400?

 A: 2, 3, 5, 179, 181

Why are those the prime factors of the number 311,030,400?

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 311,030,400

311,030,400
Factor Arrows
2155,515,200
Factor Arrows
277,757,600
Factor Arrows
238,878,800
Factor Arrows
219,439,400
Factor Arrows
29,719,700
Factor Arrows
24,859,850
Factor Arrows
22,429,925
Factor Arrows
3809,975
Factor Arrows
5161,995
Factor Arrows
532,399
Factor Arrows
179181

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, 179, 181

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 3 x 5 x 5 x 179 x 181 = 311,030,400

This can also be written as 27 x 31 x 52 x 1791 x 1811 = 311,030,400

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


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