find "vollkommene zahlen" in python

vollkommen-II.py

#!/usr/bin/env python
"""
find "vollkommene zahlen" in python
---
from https://en.wikipedia.org/wiki/Perfect_number:
"In number theory, a perfect number is a positive integer that is equal to
the sum of its proper positive divisors, that is, the sum of its positive
divisors excluding the number itself"
---
despite the "-II" in the file name this version is rather a crude 1st draft of a "brut force" algorithm...

@author: halloleo
"""

import math


def factors(n, foundFactors):
    ff = foundFactors
    for i in xrange(2, n/2+1):
        if n % i == 0: 
            if not i in ff:
             ff.append(i)
    ff.append(1)
    return ff
    

def show(ff, n):
    print
    print "---", ff , "---"
    
    print "sum:", sum(ff)
 
def loopOver():
    n = 2
    while True:
        ff = factors(n, [])
        if sum(ff) == n:
            show(ff, n)
        n += 1
    

if __name__ == "__main__":
    # flush print statements
    import os, sys
    sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
    # do the job
    loopOver()