'''simple docstring'''
from math import sqrt







def  _UpperCamelCase (     _a	:	int			):




    """simple docstring"""



    __UpperCamelCase	:	List[Any]		    =  0
    for i in range(1				,     int(sqrt(_a			) + 1			)			):
        if n % i == 0 and i != sqrt(_a			):
            total += i + n // i
        elif i == sqrt(_a			):
            total += i
    return total - n







def  _UpperCamelCase (     _a	:	int = 1_0_0_0_0			):




    """simple docstring"""



    __UpperCamelCase	:	Any		    =  sum(
        i
        for i in range(1				,     _a			)
        if sum_of_divisors(sum_of_divisors(_a			)			) == i and sum_of_divisors(_a			) != i			)
    return total


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




'''simple docstring'''
from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available


a=  {'''configuration_vit_msn''': ['''VIT_MSN_PRETRAINED_CONFIG_ARCHIVE_MAP''', '''ViTMSNConfig''']}

try:
  if not is_torch_available():
    raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
  pass
else:
  a=  [
      '''VIT_MSN_PRETRAINED_MODEL_ARCHIVE_LIST''',
      '''ViTMSNModel''',
      '''ViTMSNForImageClassification''',
      '''ViTMSNPreTrainedModel''',
  ]

if TYPE_CHECKING:
  from .configuration_vit_msn import VIT_MSN_PRETRAINED_CONFIG_ARCHIVE_MAP, ViTMSNConfig

  try:
    if not is_torch_available():
      raise OptionalDependencyNotAvailable()
  except OptionalDependencyNotAvailable:
    pass
  else:
    from .modeling_vit_msn import (
        VIT_MSN_PRETRAINED_MODEL_ARCHIVE_LIST,
        ViTMSNForImageClassification,
        ViTMSNModel,
        ViTMSNPreTrainedModel,
    )

else:
  import sys

  a=  _LazyModule(__name__, globals()['''__file__'''], _import_structure, module_spec=__spec__)



