def factors(n):
    f = []

    c = 0
    while n % 2 == 0:
        n //= 2
        c += 1
    if c > 0:
        f.append((2, c))

    lim = int(n**0.5 + 0.1)
    for p in range(3, lim + 1, 2):
        c = 0
        while n % p == 0:
            n //= p
            c += 1
        if c > 0:
            f.append((p, c))
    if n != 1:
        f.append((n, 1))

    return f


N = int(input())
ans = 1
#print(factors(N))
for (p, x) in factors(N):
#    ans *= sum(p**i for i in range(x + 1))
    s = pw = 1
    for i in range(x):
        pw *= p
        s += pw
    ans *= s

print(ans)