You are given a positive integer n. Your task is to determine whether it is a Perfect number. A number is perfect if it equals the sum of all its positive proper divisors, excluding the number itself.
Input: n = 6
Output: Yes
Explanation: The proper divisors of 6 are 1, 2, and 3. Their sum is 1 + 2 + 3 = 6. Therefore, 6 is a Perfect number.
Input: n = 28
Output: Yes
Explanation: The proper divisors of 28 are 1, 2, 4, 7, and 14. Their sum is 1 + 2 + 4 + 7 + 14 = 28. Therefore, 28 is a Perfect number.
Input: n = 10
Output: No
Explanation: The proper divisors of 10 are 1, 2, and 5. Their sum is 1 + 2 + 5 = 8, which is not equal to 10.
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