Q: What are the prime factors of the number 278,516,880?

 A: 2, 3, 5, 14327

Why are those the prime factors of the number 278,516,880?

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 278,516,880

278,516,880
Factor Arrows
2139,258,440
Factor Arrows
269,629,220
Factor Arrows
234,814,610
Factor Arrows
217,407,305
Factor Arrows
35,802,435
Factor Arrows
31,934,145
Factor Arrows
3644,715
Factor Arrows
3214,905
Factor Arrows
371,635
Factor Arrows
514,327

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, 5, 14327

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 5 x 14,327 = 278,516,880

This can also be written as 24 x 35 x 51 x 14,3271 = 278,516,880

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


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