Q: What are the prime factors of the number 311,332,736?

 A: 2, 11, 13, 73, 233

Why are those the prime factors of the number 311,332,736?

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 311,332,736

311,332,736
Factor Arrows
2155,666,368
Factor Arrows
277,833,184
Factor Arrows
238,916,592
Factor Arrows
219,458,296
Factor Arrows
29,729,148
Factor Arrows
24,864,574
Factor Arrows
22,432,287
Factor Arrows
11221,117
Factor Arrows
1317,009
Factor Arrows
73233

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, 11, 13, 73, 233

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 11 x 13 x 73 x 233 = 311,332,736

This can also be written as 27 x 111 x 131 x 731 x 2331 = 311,332,736

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


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