Let S be the set of positive integers N with the property that the last four digits of N are 2020, and when the last four digits are removed, the result is a divisor of N. For example, 42,020 is in S because 4 is a divisor of 42,020 . Find the sum of all the digits of all the numbers in S. For example, the number 42,020 contributes 4+2+0+2+0=8 to this total.