Q: What are the prime factors of the number 311,320,000?

 A: 2, 5, 43, 181

Why are those the prime factors of the number 311,320,000?

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 311,320,000

311,320,000
Factor Arrows
2155,660,000
Factor Arrows
277,830,000
Factor Arrows
238,915,000
Factor Arrows
219,457,500
Factor Arrows
29,728,750
Factor Arrows
24,864,375
Factor Arrows
5972,875
Factor Arrows
5194,575
Factor Arrows
538,915
Factor Arrows
57,783
Factor Arrows
43181

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, 43, 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 5 x 5 x 5 x 5 x 43 x 181 = 311,320,000

This can also be written as 26 x 54 x 431 x 1811 = 311,320,000

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


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