n = int(input())
m = int(n * (n + 1) / 2)
ret = i = 1
while i * i <= n:
    i += 1
    cnt = 1
    while n % i == 0 and m % i == 0:
        cnt += 1
        n /= i
        m /= i
    ret *= (i**ret - 1) / (i - 1)
ret *= n + 1 if n > 1 else 1
print(int(ret))