Q: What are the prime factors of the number 278,272?

 A: 2, 1087

Why are those the prime factors of the number 278,272?

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 278,272

278,272
Factor Arrows
2139,136
Factor Arrows
269,568
Factor Arrows
234,784
Factor Arrows
217,392
Factor Arrows
28,696
Factor Arrows
24,348
Factor Arrows
22,174
Factor Arrows
21,087

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, 1087

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 2 x 1,087 = 278,272

This can also be written as 28 x 1,0871 = 278,272

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


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