The only prime factor of 81 is: 3.
The prime factors of 225 are: 3 and 5.
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Prime factors of 225=3x3x5x5.
225 has 2 prime factors namely 3 and 5.
The prime factors of 225 are 3 and 5
As a product of its prime factors: 225*5 = 100
The prime factors of 81 are 3x3x3x3 (or 34 in expontial form). The prime factors of 108 are 2x2x3x3x3 (or 22 x 33 in exponential form).