n,k=map(int,input().split())
l=[]
for i in range(1,int(n**0.5)+2):
  if n%i==0:
    l.append(i)
    l.append(n//i)
l=list(set(l))
l.sort()
l.reverse()
for i in range(len(l)):
  if n//l[i]>=2:
    print(l[i])
    exit()