약수의 개수와 덧셈.py

def solution(left, right):
    answer = 0

    for num in range(left, right + 1):
        count = 0
        for i in range(1, int(num/2)+1):
            if num % i == 0:
                count += 1
        if count % 2 == 0:
            answer -= num
        else:
            answer += num
    return answer