[Introduction to programming in Java notes] 1.3.9 factoring integers factor decomposition

Prime A Prime is an integer greater than one whose only positive divisors is one and itself.
The prime factor decomposition of an integer is a collection of the product equal to this prime number.
Example: 3757208 = 2*2*2*7*13*13*397

 Public classfactors{ Public Static voidMain (string[] args) {//Print The prime factors of N.        LongN = Long.parselong (args[0]); Longn =N;  for(Longi = 2; I <= n/i; i++)        { //Cast out and print I factors             while(n% i = = 0) {n/=i; System.out.print (i+ " "); //Any factors of n is greater than I.            }        }     if(N > 1) System.out.print (n);    System.out.println (); }}

Not understand ...

[Introduction to programming in Java notes] 1.3.9 factoring integers factor decomposition