If you multiply the age of the Seongju by the age of Seongju's younger brother, you get 16. How many possible numbers are there for the age of Seongju? (However, Seongju and his younger brother are not twins.)
16 [OP_LIST_GET_DIVISOR] [OP_LIST_LEN] 2 [OP_FDIV]
var_a = 16
list_a = []
num_sqrt = int(math.sqrt(var_a))
for i in range(1, num_sqrt+1):
    if var_a % i == 0:
        list_a.append(i)
        list_a.append(int(var_a/i))
list_a = sorted(set(list_a))
var_b = len(list_a)
var_c = 2
var_d = var_b // var_c
print(int(var_d))