答:408=37+41+43+47+53+59+61+67
http://baike.baidu.com/link?url=iWT_PnBuZ9EeM59O2CI2Fqq7CC1UN3tN-rPaXTTQiFozMOcJn_ojWviZaNPfX6I5PC_SaCnshcHO57EpzEOE-q