[32,n] = 32n ⇔ 32 si n sunt numere prime intre ele;
⇒ n = nr. impar
S = 32(3+5+7+........+99) ..
S1 = 3+5+7+......+ 99 = 1+2+3+4+5+......+99 - S2
S2 = 2+4+6+.....+98 = 2(1+2+3+......+49) = 2·49·50/2 = 2450
S1 = 99·100/2 = 4950 - 2450 = 2500
S = 32·2500 = 80000
