
'''simple docstring'''
import warnings

from diffusers import StableDiffusionImgaImgPipeline  # noqa F401


warnings.warn(
    'The `image_to_image.py` script is outdated. Please use directly `from diffusers import'
    ' StableDiffusionImg2ImgPipeline` instead.'
)

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






def  __SCREAMING_SNAKE_CASE				(  _SCREAMING_SNAKE_CASE				):
							_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  __SCREAMING_SNAKE_CASE				(  _SCREAMING_SNAKE_CASE = 1_0000				):
							_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())))