#include <stdio.h>
int main(void) {
int n,b,i;
for(n=2;n<=10000;n++){
b=1;
for(i=2;i<n;i++){
if(n%i==0){
b=b+i;
}
}
if(n==b){
printf("%d is a perfect number\n",n
); }
}
return 0;
}
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