Q: What are the prime factors of the number 287,360?

 A: 2, 5, 449

Why are those the prime factors of the number 287,360?

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 287,360

287,360
Factor Arrows
2143,680
Factor Arrows
271,840
Factor Arrows
235,920
Factor Arrows
217,960
Factor Arrows
28,980
Factor Arrows
24,490
Factor Arrows
22,245
Factor Arrows
5449

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, 449

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 2 x 5 x 449 = 287,360

This can also be written as 27 x 51 x 4491 = 287,360

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


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