fun main(args:Array<String>) {
    val (n, k) = readLine()!!.split(" ").map { it.toLong() }

    if(k == 1L) {
        println(n)
        return
    }

    val maxIndex = Math.sqrt(n.toDouble()).toLong()
    var ans = 1L
    for(i in (1..maxIndex)) {
        if(n % i != 0L) {
            continue
        }
        val num = (n/i).let { listOf(it, n / it) }.sortedDescending()
        for(j in num) {
            val tmp = n / j
            if(2 <= tmp) {
                ans = Math.max(ans, j)
            }
        }
    }
    println(ans)
}