Q: What are the prime factors of the number 284,240?

 A: 2, 5, 11, 17, 19

Why are those the prime factors of the number 284,240?

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 284,240

284,240
Factor Arrows
2142,120
Factor Arrows
271,060
Factor Arrows
235,530
Factor Arrows
217,765
Factor Arrows
53,553
Factor Arrows
11323
Factor Arrows
1719

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, 17, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 11 x 17 x 19 = 284,240

This can also be written as 24 x 51 x 111 x 171 x 191 = 284,240

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


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