N = int(input())

ans = 1

for i in range(2, int(N ** 0.5) + 1):
    
    x = i
    
    while N % i == 0:
        
        x *= i
        
        N //= i
        
    x -= 1
    x //= i - 1
    ans *= x

if N != 1:
    ans *= N + 1
    
print(ans)