Q: What are the prime factors of the number 203,520?

 A: 2, 3, 5, 53

Why are those the prime factors of the number 203,520?

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 203,520

203,520
Factor Arrows
2101,760
Factor Arrows
250,880
Factor Arrows
225,440
Factor Arrows
212,720
Factor Arrows
26,360
Factor Arrows
23,180
Factor Arrows
21,590
Factor Arrows
2795
Factor Arrows
3265
Factor Arrows
553

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, 3, 5, 53

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 3 x 5 x 53 = 203,520

This can also be written as 28 x 31 x 51 x 531 = 203,520

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


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