# 約数のリストを得る
def make_divisors(n):
    divisors = []
    for i in range(1, int(n ** 0.5) + 1):
        if n % i == 0:
            divisors.append(i)
            if i != n // i:
                divisors.append(n // i)
    return divisors


N = int(input())
A = list(map(int, input().split()))

D = {}
for a in A:
    if a in D:
        continue
    D[a] = make_divisors(a)

dp = [0] * (max(A) + 1)

for a in A:
    if a == 1:
        dp[1] = 1

    for x in D[a]:
        if x == a:
            continue
        dp[a] = max(dp[a], dp[x] + 1)

print(max(dp))