C :

#include <stdio.h>
#include <stdlib.h>
int q(a)
{
    int sum=0,i;
    for(i=1;i<a;i++)
    {
        if(a%i==0)
        sum+=i;
    }
    if(sum==a)
    return 1;
    else return 0;
}
void w(a)
{
    int i=1;
    for(i;i<a;i++)
    if(a%i==0)
    printf("%d ",i);
  //  printf("qq");
}
int main(int argc, char *argv[])
{
    int a;
    int i;
    scanf("%d",&a);
    for(i=1;i<=a;i++)
    if(q(i))
    {
        printf("%d its factors are ",i);
        w(i);
        printf("\n");
    }

  return 0;
}

C++ :

#include<iostream>
using namespace std;
int main()
{
	int n;
	cin>>n;
	for (int i=6; i<=n; i++)
	{
		int sum=0;
		for (int j=1; j<=i/2; j++)
			if (i%j==0) sum+=j;
		if (i==sum)
		{
			cout<<i<<" its factors are ";
			for (int j=1; j<=i/2; j++)
				if (i%j==0) cout<<j<<" ";
			cout<<endl;
		}
	}
	return 0;
}