Q: What are the prime factors of the number 278,368?

 A: 2, 8699

Why are those the prime factors of the number 278,368?

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 278,368

278,368
Factor Arrows
2139,184
Factor Arrows
269,592
Factor Arrows
234,796
Factor Arrows
217,398
Factor Arrows
28,699

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, 8699

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 8,699 = 278,368

This can also be written as 25 x 8,6991 = 278,368

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


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