[seqfan] Re: sigma(odd square) = odd square

[Frank Adams-Watters]

You might mention this number in the comments for A161942.

Franklin T. Adams-Watters


-----Original Message-----
From: Zak Seidov <zakseidov at mail.ru>
To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
Sent: Sat, Feb 13, 2016 2:13 pm
Subject: [seqfan] Re: sigma(odd square) = odd square

Just found:sigma (1476326929 = 7^2*11^2*499^2) = 1891467081 = 3^2*7^2*19^2*109^2.Next one?>Суббота, 13 февраля 2016, 23:05 +03:00 от Zak Seidov <zakseidov at mail.ru>:>>>Are 1 and 81 the only odd squares with odd square sigma:>sigma(1)=1 and sigma(81)=121?>-- >Zak  Seidov>>_______________________________________________>>Seqfan Mailing list -  http://list.seqfan.eu/_______________________________________________Seqfan Mailing list - http://list.seqfan.eu/