Q: What are the prime factors of the number 311,113,216?

 A: 2, 83, 7321

Why are those the prime factors of the number 311,113,216?

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 311,113,216

311,113,216
Factor Arrows
2155,556,608
Factor Arrows
277,778,304
Factor Arrows
238,889,152
Factor Arrows
219,444,576
Factor Arrows
29,722,288
Factor Arrows
24,861,144
Factor Arrows
22,430,572
Factor Arrows
21,215,286
Factor Arrows
2607,643
Factor Arrows
837,321

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, 83, 7321

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 2 x 2 x 83 x 7,321 = 311,113,216

This can also be written as 29 x 831 x 7,3211 = 311,113,216

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


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