by nsguy1350 » Tue Feb 12, 2013 7:37 pm
The shortcut is to multiply the terms [unparseable or potentially dangerous latex formula] for each term [unparseable or potentially dangerous latex formula] in the prime factorization of a number [unparseable or potentially dangerous latex formula].
Expanding this out, you get [unparseable or potentially dangerous latex formula] [unparseable or potentially dangerous latex formula][unparseable or potentially dangerous latex formula]
This is somewhat difficult to see at first, but if you expanded this out fully, you would get the sum of all possible products of combinations of powers (likely badly worded there) that divide [unparseable or potentially dangerous latex formula], which ultimately gives you the sum of all of the positive integral divisors of [unparseable or potentially dangerous latex formula].
2013 District 1/Region:
NS - 319/355
MA - 340/332
CA - 294/287
SC - 344/292
CS - 212/124 (fail)