Write a C program to check Perfect Number || C Programming Tutorials
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====== What is Perfect Number =========
In mathematics, a perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself.
28
= 1,2,4,7,14 (all possible divisible numbers)
= 1+2+4+7+14 (add one by one)
= 28 (final result match to original number)
For example, 28 is a positive number that is completely divisible by 1, 2, 4, 7 and 14. We know that the number is also divisible by itself but we will include it in the addition of divisors.
Then we add these divisors (1 + 2 + 4 + 7 + 14 = 28), it produces 28, which is equal to the number that we have considered.
So, it means that 28 is a perfect number.
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