Two positive integers are said to be friendly if each one is equal to the sum of the divisors (including 1, excluding the number itself) of the other. For example, the numbers 220 and 284 are friendly since: • sum of divisors of 220 = 1+2+4+5+10+11+20+22+44+55+110-284 • sum of divisors of 284 = 1+2+4+71+142=220. Write a C++ program containing the following: • A value returning function that takes as parameter an integer value, num, and returns the sum of its divisors, excluding the number itself. A main function that enters two positive integer values from the user and makes use of the function written above to print a message that the two values are friendly if each one is equal to the sum of the divisors of the other, and the message that they are not friendly, otherwise.

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