题解 | #质数因子#

质数因子就是把数字拆分为质数相乘的表达式

let num = +readline();

let str = "";
// i * i <= num,指数因子小于等于本身的开方
for (let i = 2; i <= num && i * i <= num; i++) {
  if (num % i === 0) {
    str = str + " " + i;
    num = num / i;
    i--;
  }
}
if (num !== 1) str = str + " " + num;

console.log(str.substr(1));