def main():
    import sys
    N, K = map(int, sys.stdin.readline().split())
    
    if N == 1:
        print(1)
        return
    
    divisors = set()
    for i in range(1, int(N**0.5) + 1):
        if N % i == 0:
            divisors.add(i)
            divisors.add(N // i)
    
    sorted_divisors = sorted(divisors, reverse=True)
    
    for d in sorted_divisors:
        if d != N and d <= N // 2:
            print(d)
            return
    
    print(1)

if __name__ == "__main__":
    main()