k=[]
for num in range(1,1000):
    s=0
    for i in range(1,num):
        if(num%i==0):
            s+=i
    if(s==num):
        k.append(num)
        
print("Perfect numbers between 100 and 1000 are:")
for i in range(len(k)):
    print(k[i])

input("Press enter to exit")