Q: What are the prime factors of the number 310,912?

 A: 2, 7, 347

Why are those the prime factors of the number 310,912?

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 310,912

310,912
Factor Arrows
2155,456
Factor Arrows
277,728
Factor Arrows
238,864
Factor Arrows
219,432
Factor Arrows
29,716
Factor Arrows
24,858
Factor Arrows
22,429
Factor Arrows
7347

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, 7, 347

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 7 x 347 = 310,912

This can also be written as 27 x 71 x 3471 = 310,912

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


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