Q: What are the prime factors of the number 251,500?

 A: 2, 5, 503

Why are those the prime factors of the number 251,500?

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 251,500

251,500
Factor Arrows
2125,750
Factor Arrows
262,875
Factor Arrows
512,575
Factor Arrows
52,515
Factor Arrows
5503

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, 503

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 5 x 503 = 251,500

This can also be written as 22 x 53 x 5031 = 251,500

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


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