n=int(input())
a=list(map(int,input().split()))
L=max(a)
o=[0]*(L+1)
for v in a:
  o[v]=1
q=[0]*(L+1)
for i in range(1,L+1):
  j=1
  while j*j<=i:
    if i%j==0:
      q[i]=max(q[i],q[i//j],q[i//(i//j)])
    j+=1
  q[i]+=o[i]
print(max(q[i] for i in range(L+1) if o[i]))