Special Numbers

"use strict";

function specialNumbers(input) {
  //Input
  let n = Number(input[0]);
  let str = '';

  for (let i = 1; i < 10; i++) {

    for (let j = 1; j < 10; j++) {

      for (let k = 1; k < 10; k++) {

        for (let l = 1; l < 10; l++) {

          if ( (n % l == 0) && (n % k == 0) && (n % j == 0) && (n % i == 0) ) {
            str += `${i}${j}${k}${l} `;
          }
        }
      }
    }
  }
  console.log(str);
}

specialNumbers(
  [ '16' ]
);