Mohon di bantu ya guys, jawaban kalian akan sangat saya hargai

a . s(25) = 1+5+25=31 , s(30) = 1+2+3+5+6+10+15+30 = *hasilnya itung ndiri aja ya :3 s(32) = 1+2+4+8+16+32 =

b . s(14) = 1+2+7+14 =24 s(15) = 1+3+5+15 =24
c. iya
s(3) =1+3 =4
s(5) =1+5 = 6
4 X 6 = 24

s(15) = 1+3+5+15 = 24