C++ language Write a function that computes the sum of an integer, non-zero, number's positive divisors. The function has one parameter, the integer number and returns one value, the integer sum. A number's divisors divide the number with remainder zero

if the function's parameter is 6 then the function returns 12 because 6's positive divisors are 1,2,3 and 6.

If the function's parameter is -5 then the function returns 6 because -5 's positive divisors are 1 and 5.

If the function's parameter is 5 then the function return 6 because 5's positive divisors are 1 and 5.

If the function's parameter is 28 then the function returns 56 because 28's positive divisors are 1, 2, 4, 7,14, and 28.