Q: What are the prime factors of the number 249,760?

 A: 2, 5, 7, 223

Why are those the prime factors of the number 249,760?

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 249,760

249,760
Factor Arrows
2124,880
Factor Arrows
262,440
Factor Arrows
231,220
Factor Arrows
215,610
Factor Arrows
27,805
Factor Arrows
51,561
Factor Arrows
7223

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, 7, 223

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 7 x 223 = 249,760

This can also be written as 25 x 51 x 71 x 2231 = 249,760

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


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