If NN denotes the set of all positive integersand if f:NN rarrN is def – InterviewSolution

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1.	If NN denotes the set of all positive integersand if f:NN rarrN is defined by f(n)= the sum of positive divisors of n then f(2^(k).3), where k is a positive integer is
Answer» `2^(k+1)-1` `2(2^(k+1)-1)` `3(2^(k+1)-1)` `4(2^(k+1)-1)` ANSWER :D

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