


"""simple docstring"""






from math import sqrt


def __lowercase     (      lowerCamelCase_  :      int  ):
				SCREAMING_SNAKE_CASE__     							=				0
				for i in range(1						,					int(sqrt(lowerCamelCase_  ) + 1  )  ):
								if n % i == 0 and i != sqrt(lowerCamelCase_  ):
												total += i + n // i
								elif i == sqrt(lowerCamelCase_  ):
												total += i
				return total - n


def __lowercase     (      lowerCamelCase_  :      int = 10000  ):
				SCREAMING_SNAKE_CASE__     							=				sum(
				    i
				    for i in range(1						,					lowerCamelCase_  )
				    if sum_of_divisors(sum_of_divisors(lowerCamelCase_  )  ) == i and sum_of_divisors(lowerCamelCase_  ) != i  )
				return total


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




"""simple docstring"""






from math import pi


def __lowercase     (      lowerCamelCase_  :      int						,					lowerCamelCase_  :      int  ):
				return 2 * pi * radius * (angle / 360)


if __name__ == "__main__":
	print(arc_length(90, 10))
