# Filename: perfect.py
a = True
n = 0
while a == True: # To loop the following commands
running = True
while running == True:
r = 0
n = n+ 1
for x in range(1,n + 1):
if n%x == 0: # To determine the factors of n
r = r + x
if x == n:
if r == 2*n:
print n
running = False
else:
running = False