Q: What are the prime factors of the number 278,871,528?

 A: 2, 3, 13, 71, 12589

Why are those the prime factors of the number 278,871,528?

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 278,871,528

278,871,528
Factor Arrows
2139,435,764
Factor Arrows
269,717,882
Factor Arrows
234,858,941
Factor Arrows
311,619,647
Factor Arrows
13893,819
Factor Arrows
7112,589

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, 3, 13, 71, 12589

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 13 x 71 x 12,589 = 278,871,528

This can also be written as 23 x 31 x 131 x 711 x 12,5891 = 278,871,528

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


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