11.22.3

#include<stdio.h>

int main()

{

int i,k,l,sum1=0,sum2=0;

for(i=1;i<=3000;i++)

{

for(k=1;k<=i/2;k++)

{if(i%k==0)

{sum1+=k;

}

}

for(l=1;l<=sum1/2;l++)

{if(sum1%l==0)

{sum2+=l;

}

}

if(i==sum2&&sum1>i&&sum1<=3000)

{printf("(%d,%d)",i,sum1);

}

sum1=0;sum2=0;

}

return 0;

}