Perfect number:
#include<stdio.h>
#include<conio.h>
int main()
{
int n,i=1,sum=0;
printf("Enter a number: ");
scanf("%d",&n);
while(i<n)
{
if(n%i==0)
sum=sum+i;
i++;
}
if(sum==n)
printf("%d is a perfect number",i);
else
printf("%d is not a perfect number",i);
return 0;
getch();
}
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