JSFiddle - React, Tailwind, and code Playground

HTML

<select name="source" id="source" on>
    <option value="1">first choice</option>
    <option value="2">second choice</option>
</select>
<hr/>
<select name="target" id="target">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
    <option value="5">5</option>
</select>

JavaScript

$("#source").on("change", function(){
    sourceVal = parseInt(this.value);
    $("#target > option").each(function(){
        curr = parseInt(this.value);
        if(curr%sourceVal == 0){
            $(this).show();
        }
        else{
            $(this).hide();
        }
    })
});