Code Golf: Prime Factors of a Number

code-golf

What is the shortest way, by character count, to find prime factors in any number?

Example Input: 1806046

Example Output: 2x11x11x17x439

Example Calculator

Best Solution

C#, 69

x is input number

int i=2;while(x>1)if(x%i++==0){x/=--i;Console.Write(i+(x>1?"x":""));};

With includes:

using system;
namespace nameSP
{
   class Program
   {
     static void Main(string[] args)
     { 
        int i=2;while(x>1)if(x%i++==0){x/=--i;Console.Write(i+(x>1?"x":""));};
     }
   }
}
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