Q: What are the prime factors of the number 311,537,248?

 A: 2, 11, 61, 1319

Why are those the prime factors of the number 311,537,248?

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 311,537,248

311,537,248
Factor Arrows
2155,768,624
Factor Arrows
277,884,312
Factor Arrows
238,942,156
Factor Arrows
219,471,078
Factor Arrows
29,735,539
Factor Arrows
11885,049
Factor Arrows
1180,459
Factor Arrows
611,319

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, 61, 1319

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 11 x 11 x 61 x 1,319 = 311,537,248

This can also be written as 25 x 112 x 611 x 1,3191 = 311,537,248

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


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