#!/usr/bin/env python
def showMaxFactor(num):
count = num / 2
while count > 1:
if (num % count == 0):
print 'largest factor of %d is %d' % \
(num, count)
break
elif count == 2:
print eachNum, 'is prime'
count = count - 1
for eachNum in range(10, 21):
showMaxFactor(eachNum)