NPCI(National Payments Corporation of India) Interview

Below coding questions were asked in HackerRank test along with 8 MCQs and test was for 90 mins.

Question 1 : You are given an array of integers.
                     Return an array of sum of factors of each integer.
           E.g. : Input -> [12]
                    factors are - 1, 2, 3, 4, 6, 12
                    Output -> [28]
Note - Sum can be greater than Integer, so consider it as long or Long, so ou can return
           List<Long>
           Ever integer will in range of 1 to 1000000
           Input array size will be in range of 1 to 100000000

Question 2 : You are given a string of binary number.
                      You need to return the count of unique integers which can be created by the
                      subsets of given binary number.
               E.g. : Input -> 011
                        Subsets -> 0, 1, 01, 11, 011
                        Integers -> 0, 1, 1      3, 3
                        Unique Integers -> 0, 1, 3
                        Output -> 3
Note - Input binary string will be of length 1 to 20

Please suggest your answers for the above questions.