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Greater of friendly pairs where both terms belong to A014574.
1

%I #8 Aug 31 2012 14:14:37

%S 600,1488,19890,69030,77688,153888,175392,204750,263400,296478,328848,

%T 373230,385392,397152,402528,450600,510048,523488,609600,632352,

%U 710910,965400,1101672,1109400,1128600,1163232,1206768,1251432,1318410,1393938,1423968,1427400

%N Greater of friendly pairs where both terms belong to A014574.

%C In the uploaded table, only 2 instances are primitive friendly: {1488, 270} and {52717500, 2418000}.

%H Michel Marcus, <a href="/A216058/b216058.txt">Table of n, a(n) for n = 1..1000</a>

%H Michel Marcus, <a href="/A216058/a216058.log.txt">The friendly pairs</a>

%e 600 is in the sequence, because 600 and 240 belong to A014574 and sigma(600)/600 = sigma(240)/240 = 31/10.

%Y Cf. A014574.

%K nonn

%O 1,1

%A _Michel Marcus_, Aug 31 2012