题解 | #完全数计算#

const readline = require("readline");

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
});

let total = 0;

const isPerfectNum = (num: number) => {
    const maxNum = Math.sqrt(num);
    let addNum = 0;
    for (let i = 1; i < maxNum; i++) {
        if (num % i === 0) {
            addNum = addNum + i + num / i;
        }
    }
    return addNum === num * 2;
};

rl.on("line", function (line) {
    const num = parseInt(line);
    for (let i = 1; i <= num; i++) {
        if (isPerfectNum(i)) {
            total++;
        }
    }
    console.log(total);
});