from collections import defaultdict
N = int(raw_input())

n = N
i = 2
num1, num2 = defaultdict(int), defaultdict(int)
while i*i <= n:
    cnt = 0
    while n % i == 0:
        n /= i
        cnt += 1
    if cnt > 0:
        num1[i] = cnt
    i += 1
if n > 1:
    num1[n] = 1

n = N*(N + 1)/2
i = 2
while i*i <= n:
    cnt = 0
    while n % i == 0:
        n /= i
        cnt += 1
    if cnt > 0:
        num2[i] = cnt
    i += 1
if n > 1:
    num2[n] = 1

ans = 1
for a, p in num1.items():
    p = min(p, num2[a])
    ans *= (a ** (p + 1) - 1) / (a - 1)
print ans