Trying to find factors of a number in JS

Question

I am just starting JS, and understand the concept of finding a factor. However, this snippet of code is what I have so far. I have the str variable that outputs nothing but the

Answer 1

As an even more performant complement to @the-quodesmith's answer, once you have a factor, you know immediately what its pairing product is:

function getFactors(num) {
  const isEven = num % 2 === 0;
  let inc = isEven ? 1 : 2;
  let factors = [1, num];

  for (let curFactor = isEven ? 2 : 3; Math.pow(curFactor, 2) <= num; curFactor += inc) {
    if (num % curFactor !== 0) continue;
    factors.push(curFactor);
    let compliment = num / curFactor;
    if (compliment !== curFactor) factors.push(compliment);
  }

  return factors;
}

for getFactors(300) this will run the loop only 15 times, as opposed to +-150 for the original.