sum_of_divisor.c 
  C program to find sum of all divisors of a positive integer n using prime factorization
  
  Use the following command to compile
  gcc sum_of_divisor.c -o sum_of_divisor -lm
  
  Use the following command to run program 
  ./sum_of_divisor

Prim_MST.c
  C program to find Minimum Spanning Tree using Prim's Algorithm
  
  Use the following command to compile
  gcc Prim_MST.c -o Prim_MST -lm
  
  Use the following command to run program 
  ./Prim_MST