#int(input())
#map(int, input().split())
#list(map(int, input().split()))

A, B, N = map(int, input().split())

mod = 10 ** 9 + 7

from itertools import product
from math import gcd

ans = 1

l = list(range(A, B+1))
# print(l)

for x in product(l, repeat=N):
    g = x[0]
    for i in range(N):
        g = gcd(g, x[i])
    ans = (ans * g) % mod

print(ans)