1 #include<stdio.h>
 2 int main()
 3 {
 4     int i,j,k;
 5     for(i=1;i<1000;i++)
 6     {
 7         int sum=0;
 8         for(j=1;j<i;j++)
 9         {
10             if(i%j==0){    
11                 sum+=j;
12             } 
13         }
14             if(sum==i){
15             printf("%d its factors are ",i );
16             for(k=1;k<i;k++)
17         {
18             if(i%k==0){    
19                 printf("%d ",k);}
20             } 
21             printf("\n");
22         }
23     }    
24     return 0;    
25 }