Q: What are the prime factors of the number 251,200?

 A: 2, 5, 157

Why are those the prime factors of the number 251,200?

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 251,200

251,200
Factor Arrows
2125,600
Factor Arrows
262,800
Factor Arrows
231,400
Factor Arrows
215,700
Factor Arrows
27,850
Factor Arrows
23,925
Factor Arrows
5785
Factor Arrows
5157

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, 5, 157

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 5 x 5 x 157 = 251,200

This can also be written as 26 x 52 x 1571 = 251,200

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


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