Q: What are the prime factors of the number 251,240?

 A: 2, 5, 11, 571

Why are those the prime factors of the number 251,240?

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 251,240

251,240
Factor Arrows
2125,620
Factor Arrows
262,810
Factor Arrows
231,405
Factor Arrows
56,281
Factor Arrows
11571

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, 11, 571

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 11 x 571 = 251,240

This can also be written as 23 x 51 x 111 x 5711 = 251,240

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


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