1/3015 + 1/6030 = 1/2010
1/2680 + 1/8040 = 1/2010
两组四位数的
其它位数有：
1/2412 + 1/12060 = 1/2010
1/2345 + 1/14070 = 1/2010
1/2211 + 1/22110 = 1/2010
1/2144 + 1/32160 = 1/2010
1/2077 + 1/62310 = 1/2010
1/2040 + 1/136680 = 1/2010
.等等