Q: What are the prime factors of the number 251,776?

 A: 2, 7, 281

Why are those the prime factors of the number 251,776?

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 251,776

251,776
Factor Arrows
2125,888
Factor Arrows
262,944
Factor Arrows
231,472
Factor Arrows
215,736
Factor Arrows
27,868
Factor Arrows
23,934
Factor Arrows
21,967
Factor Arrows
7281

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, 281

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 281 = 251,776

This can also be written as 27 x 71 x 2811 = 251,776

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


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