
'''simple docstring'''



from math import sqrt
def    lowerCAmelCase_	(				SCREAMING_SNAKE_CASE_						)     ->     int:




   """simple docstring"""
   _SCREAMING_SNAKE_CASE      =				0
   for i in range(1    ,      int(sqrt(SCREAMING_SNAKE_CASE_						) + 1						)						):
      if n % i == 0 and i != sqrt(SCREAMING_SNAKE_CASE_						):
         total += i + n // i
      elif i == sqrt(SCREAMING_SNAKE_CASE_						):
         total += i
   return total - n
def    lowerCAmelCase_	(				SCREAMING_SNAKE_CASE_ = 1_00_00						)     ->     int:




   """simple docstring"""
   _SCREAMING_SNAKE_CASE      =				sum(
       i
       for i in range(1    ,      SCREAMING_SNAKE_CASE_						)
       if sum_of_divisors(sum_of_divisors(SCREAMING_SNAKE_CASE_						)						) == i and sum_of_divisors(SCREAMING_SNAKE_CASE_						) != i						)
   return total


if __name__ == "__main__":
     print(solution(int(str(input()).strip())))








'''simple docstring'''



import math
from collections.abc import Iterator
from itertools import takewhile
def    lowerCAmelCase_	(				SCREAMING_SNAKE_CASE_						)     ->     bool:




   """simple docstring"""

   if 1 < number < 4:
      # 2 and 3 are primes
      return True
   elif number < 2 or number % 2 == 0 or number % 3 == 0:
      # Negatives, 0, 1, all even numbers, all multiples of 3 are not primes
      return False

   # All primes number are in format of 6k +/- 1
   for i in range(5    ,      int(math.sqrt(SCREAMING_SNAKE_CASE_						) + 1						)    ,      6						):
      if number % i == 0 or number % (i + 2) == 0:
         return False
   return True
def    lowerCAmelCase_	(				)     ->     Iterator[int]:




   """simple docstring"""
   _SCREAMING_SNAKE_CASE      =				2
   while True:
      if is_prime(SCREAMING_SNAKE_CASE_						):
         yield num
      num += 1
def    lowerCAmelCase_	(				SCREAMING_SNAKE_CASE_ = 2_00_00_00						)     ->     int:




   """simple docstring"""
   return sum(takewhile(lambda SCREAMING_SNAKE_CASE_						: x < n    ,      prime_generator()						)						)


if __name__ == "__main__":
     print(f"""{solution() = }""")






