If the sum of a positive integer and the sum of its positive divisors is 4035, find the largest value of the number​

This is so hard and it’s for a test

Which expression is equivalent to 3^3 + 2^2?

If you can solve all of these i will give ! - 4% of 190 - 4% of 162.5 - 4% of 140 - a 4% increase from 155.1 - a 4% increase from 159.8