How can I mix the method so that all factors are display? I am missing one more factor

Question

    public static String factorX(long x){
        String factor="";
        long number = x;
        long i = 2;  
        while (i < number) {  
                if (number % i == 0) {
                factor += i+", "; 
                number /= i;

            } else {
                i++;
            }
        }

        return factor; 

For example if I put 120, i get 2,2,2,3. I am missing factor 5. Everything else works find;

is just that thing that is not displayed.....................................................................

Answer 1

Change:

while (i < number) {

to:

while (i <= number) {

and you're good to go. However, this wouldn't print 1 or 2 as the prime factors of the numbers 1 and 2, respectively. So you might want to add something like this as well:

    if(x < 2) {
        return "" + x;
    }
    return factor;