文档解释Errornumber:MY-011462;Symbol:ER_GRP_RPL_SERVER_CONN_ERROR;SQLSTATE:HY000Message:ErrorwhenestablishingaserverconnectionduringtheCertificationmoduleinitializa...

题目链接题意：　　给定一个n，求：GCD(1,2)+GCD(1,3)+GCD(2,3)+……+GCD(1,n)+GCD(2,n)+……+GCD(n-1,n);   设f(n)= ΣGCD(i,n),i=1,2,3...