[프로그래머스] 약수의 개수와 덧셈
https://programmers.co.kr/learn/courses/30/lessons/77884
function solution(left, right) {
var answer = 0;
for(let i = left; i <= right; i++){
let count = 0;
for(let j = 1; j <= i; j++){
if(i % j === 0)
count++
}
if(count % 2 ===0)
answer += i;
else
answer -= i;
}
return answer;
}