C :

#include<stdio.h>
int main()
{
    int n,i,j;
    scanf("%d",&n);
    for(i=6; i<=n; i++)
    {
        j=i;
        int s=0,flag=0;
        while(--j)
        {
            if(i%j==0)
                s=s+j;
            if(s>i)
            {
                flag=1;
                break;
            }
        }
        if(s<i)
            continue;
        else if(flag==1)
            continue;
        else
        {
            printf("%d its factors are ",i);
            for(j=1;j<i;j++)
            {
                if(i%j==0)
                    printf("%d ",j);
            }
            printf("\n");
        }


    }
    return 0;
}

C++ :

#include<bits/stdc++.h>
using namespace std;
long long n,sum;
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		sum=0;
		for(int j=1;j<i;j++)
		    if(i%j==0)sum+=j;
		if(sum==i)
		{
			cout<<i<<" its factors are ";
			for(int j=1;j<i;j++)
		    	if(i%j==0)cout<<j<<" ";
		    cout<<"\n";
		}
	}
		
    return 0;
}