Question

the sum of factors of 1520 except the unity is

Answer 1

Let's write the factors if 1520
1*1520
2*760
4*380
5*304
8*190
10*152
16*95
20*76
38*40

adding all these factors except 1 we get, 3620(including 1520) and 2100(excluding it)

Answer 2

maya you are my friend.

We studied LKG