const rl = require("readline").createInterface({ input: process.stdin }); var iter = rl[Symbol.asyncIterator](); const readline = async () => (await iter.next()).value; // 是否是完全数 function fn(num) { const set = new Set() // num / 2 是因为约数不可能比 num/2 还要大 for (let i = 0; i <= num / 2; ...