(2+1)*(2平方+1)*(2四次方+1)*(2八次方+1)······· (2的2n次方+1),··········=(2-1)(2+1)*(2平方+1)*(2四次方+1)*(2八次方+1)······· (2的2n次方+1)=(2²-1)(2²+1))*(2四次方+1)*(2八次方+1)······· (2的2n次方+1)=(2^4-1)(2^4+1)*(2八次方+1)······· (2的2n次方+1)……=[(2^(2n)-1][2^(2n)+1]=2^(4n)-1