#include
int main (void)
{
int i, j, s = 0;
for (i = 2;i <=10000; i++)
{
for (j = 1;j < i;j++)
{
if (i%j == 0)
s += j;
}
if (s == i)
printf ("%d\n",i);
else
printf ("None\n");
}
return 0;
}