JavaScriptで値を素因数分解する

function primeFactorization(value) {
  var divisorTable = [];

  for (var number = 2; number <= value; number++) {
    if (value % number === 0) {
      var exponent = 0;
      while (value % number === 0) {
        exponent++;
        value /= number;
      }
      divisorTable.push({number, exponent});
    }
  }

  var ret = "";
  divisorTable.forEach((divisor, index) => {
    ret += `${divisor.number}^${divisor.exponent}`;
    if (index !== divisorTable.length - 1) ret += ' * ';
  })

  return ret;
}