8128 所有因数倒数之和是多少?
问题描述：
8128 所有因数倒数之和是多少?
答
8128所有因数有：1,2,4,8,16,32,64,127,2*127,4*127,8*127,16*127,32*127,64*127倒数之和是1+1/2+1/4+1/8+1/16++1/32+1/64+1/127(1+1/2+1/4+1/8+1/161+1/32+1/64)=(1+1/2+1/4+1/8+1/16+1/32+1/64)(1+1/127)=((64+32+...