Consider two natural numbers A and B. Let S be the sum of all natural divisors of 
. Determine S modulo 9901 (the rest of the division of S by 9901). 
                            输入描述:
                                                    The only line contains the two natural numbers A and B, (0 <= A,B <= 50000000)separated by blanks.
                                                                            输出描述:
                                                    The only line of the output will contain S modulo 9901.
                                                                            
                        
                            示例1
                        
                        
                            
                            
                                                            
                                    说明
                                    
                                        
The natural divisors of 8 are: 1,2,4,8. Their sum is 15. 
15 modulo 9901 is 15 (that should be output).