import java.io.BufferedReader
import java.io.InputStream
import java.io.InputStreamReader
import java.io.PrintWriter
import java.util.*

fun gcd(a:Int, b:Int):Int {
    val c = a % b
    if (c == 0) return b
    return gcd(b, c)
}

fun gcd(a:Array<Int>):Int {
    val n = a.count()
    var ret = a[0]
    for (i in 1 until n) {
        ret = gcd(ret, a[i])
    }
    return ret
}

fun PrintWriter.solve(sc: FastScanner) {
    val a = sc.nextInt()
    val b = sc.nextInt()
    val n = sc.nextInt()
    f(Array(n) { a }, a, b, 0)
    println(ans)
}

var ans = 1L

fun f(arr:Array<Int>, a:Int, b:Int, i:Int) {
    if (i == arr.count()) {
        val d = gcd(arr)
        ans *= d
        ans %= 1000000007
    } else {
        while (arr[i] <= b) {
            f(arr, a, b, i + 1)
            arr[i]++
        }
        arr[i] = a
    }
}

fun main() {
    val writer = PrintWriter(System.out, false)
    writer.solve(FastScanner(System.`in`))
    writer.flush()
}

class FastScanner(s: InputStream) {
    private var st = StringTokenizer("")
    private val br = BufferedReader(InputStreamReader(s))

    fun next(): String {
        while (!st.hasMoreTokens()) st = StringTokenizer(br.readLine())

        return st.nextToken()
    }

    fun nextInt() = next().toInt()
    fun nextLong() = next().toLong()
    fun nextLine() = br.readLine()
    fun nextDouble() = next().toDouble()
    fun ready() = br.ready()
}