Q: What are the prime factors of the number 285,184?

 A: 2, 557

Why are those the prime factors of the number 285,184?

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 285,184

285,184
Factor Arrows
2142,592
Factor Arrows
271,296
Factor Arrows
235,648
Factor Arrows
217,824
Factor Arrows
28,912
Factor Arrows
24,456
Factor Arrows
22,228
Factor Arrows
21,114
Factor Arrows
2557

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, 557

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 2 x 2 x 557 = 285,184

This can also be written as 29 x 5571 = 285,184

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


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