Q: What are the prime factors of the number 278,287,744?

 A: 2, 7, 31, 43, 233

Why are those the prime factors of the number 278,287,744?

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 278,287,744

278,287,744
Factor Arrows
2139,143,872
Factor Arrows
269,571,936
Factor Arrows
234,785,968
Factor Arrows
217,392,984
Factor Arrows
28,696,492
Factor Arrows
24,348,246
Factor Arrows
22,174,123
Factor Arrows
7310,589
Factor Arrows
3110,019
Factor Arrows
43233

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, 7, 31, 43, 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 7 x 31 x 43 x 233 = 278,287,744

This can also be written as 27 x 71 x 311 x 431 x 2331 = 278,287,744

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


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