Q: What are the prime factors of the number 251,262,176?

 A: 2, 11, 17, 199, 211

Why are those the prime factors of the number 251,262,176?

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 251,262,176

251,262,176
Factor Arrows
2125,631,088
Factor Arrows
262,815,544
Factor Arrows
231,407,772
Factor Arrows
215,703,886
Factor Arrows
27,851,943
Factor Arrows
11713,813
Factor Arrows
1741,989
Factor Arrows
199211

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, 11, 17, 199, 211

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 11 x 17 x 199 x 211 = 251,262,176

This can also be written as 25 x 111 x 171 x 1991 x 2111 = 251,262,176

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


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