Lecture Notes on 01 July 2013

# Tests if a given number is perfect or not
def main():
  num = eval (input ("Enter number: "))

  sum_divisors = 0
  limit = num // 2

  for i in range (1, limit + 1):
    if (num % i == 0):
      sum_divisors = sum_divisors + i

  if (num == sum_divisors):
    print (num, "is a perfect number")
  else:
    print (num, "is not a perfect number")

main()


# Prints all perfect numbers less than 10,000
def main():

  for j in range (1, 10001):
    sum_divisors = 0
    limit = j // 2

    for i in range (1, limit + 1):
      if (j % i == 0):
        sum_divisors = sum_divisors + i

    if (j == sum_divisors):
      print (j)

main()