Find the number of unique Prime factors of 120.

Explanation

To find the number of unique prime factors of 120, we will perform the prime factorization of the number. Here’s a step-by-step solution:

### Step 1: Start with the number 120
We begin with the number we want to factor, which is 120.

### Step 2: Divide by the smallest prime number
The smallest prime number is 2. We divide 120 by 2:
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