View Compilation Error

0_0_22501501_20360.cpp: In function 'll dfs(ll, int, int)':
0_0_22501501_20360.cpp:99:25: error: 'factor' was not declared in this scope
         ll temp=PowMode(factor[i],4);  
                         ^
0_0_22501501_20360.cpp:99:36: error: 'PowMode' was not declared in this scope
         ll temp=PowMode(factor[i],4);  
                                    ^
0_0_22501501_20360.cpp:100:44: error: 'get_sum' was not declared in this scope
         ans=(ans+ (temp*get_sum(n/factor[i]))%MOD-  
                                            ^