local mod = 1000000007
local mfl = math.floor

local function bmul(x, y)
  local x1, y1 = mfl(x / 31623), mfl(y / 31623)
  local x0, y0 = x - x1 * 31623, y - y1 * 31623
  return (x1 * y1 * 14122 + (x1 * y0 + x0 * y1) * 31623 + x0 * y0) % mod
end
local function badd(a, b) return (a + b) % mod end
local function getgcd(a, b)
  while 0 < b do
    a, b = b, a % b
  end
  return a
end
local a, b, n = io.read("*n", "*n", "*n")
local range = b - a + 1
local tot = 1
for i = 1, n do
  tot = tot * range
end
local ret = 1
local t = {}
for it = 0, tot - 1 do
  local tmp = it
  for i = 1, n do
    local v = tmp % range
    tmp = mfl(tmp / range)
    t[i] = a + v
  end
  local gcd = t[1]
  for i = 2, n do
    gcd = getgcd(gcd, t[i])
  end
  ret = bmul(ret, gcd)
end
print(ret)