import sys input = lambda :sys.stdin.readline()[:-1] ni = lambda :int(input()) na = lambda :list(map(int,input().split())) sys.setrecursionlimit(10**7) yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES") no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO") ####################################################################### n = ni() a = na() m = max(a)+1 b = [0]*m for i in range(n): b[a[i]] += 1 c = [0]*m for i in range(1,m): for j in range(i, m, i): c[i]+=b[j] #print(b) for i in range(m-2,-1,-1): c[i] = max(c[i], c[i+1]) #print(c) i = 0 for k in range(n): while i < m-1 and c[i+1]>=n-k: i += 1 print(i)