Q: What are the prime factors of the number 205,425?

 A: 3, 5, 11, 83

Why are those the prime factors of the number 205,425?

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 205,425

205,425
Factor Arrows
368,475
Factor Arrows
322,825
Factor Arrows
54,565
Factor Arrows
5913
Factor Arrows
1183

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:

3, 5, 11, 83

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 5 x 11 x 83 = 205,425

This can also be written as 32 x 52 x 111 x 831 = 205,425

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


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