Array And The Indices

You are given array 'A' of postive integers of size n.You need to make another array 'B', size of n such that B[i] = f(A[i]) for 1<=i<=n where f(x) is function which gives the sum of the factors of the number 'x' (see example for explanation). In the array you need to find the count of all the pairs (i,j) (call it M1) such that the following conditions hold , i.e. i < j and B[i]+j-i=B[j]+i-j whe