The following code shows how to Find Whether a Number is a Perfect Number or Not in C.
// To Find Whether a number is a perfect number or not
#include <stdio.h>
int main()
{
int mynum, factorsum=0, i;
printf("Enter a number: ");
scanf("%d", &mynum);
for(i=1;i<=mynum/2;i++)
{
if(mynum%i==0)
{
factorsum+=i;
}
}
if(factorsum==mynum)
{
printf("%d is a perfect number!", mynum);
}
else
{
printf("%d is not a perfect number!", mynum);
}
return 0;
}
Output
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