cap so ban be

prime = [1 for i in range(1000001)]
for i in range(2, 1000001):
    for j in range(2 * i, 1000001, i):
        prime[j] += i

cnt = 0
for i in range(220, 286):
    x = prime[i]
    if x < 1000001 and prime[x] == i and prime[i] != i:
        cnt += 1

print(cnt//2)