24 December 2020

• curprev 19:0419:04, 24 December 2020 Arthy00009 talk contribs 888 bytes +9 →Solution
• curprev 19:0319:03, 24 December 2020 Arthy00009 talk contribs 879 bytes −1 →Solution

23 May 2018

• curprev 17:4317:43, 23 May 2018 Scrabbler94 talk contribs 880 bytes −267 →Solution: original solution wasn't quite correct since the prime factorization might not be p^1q^1r^2s^4. Improved solution using more standard notation and multiplicativity of d(n).

4 July 2013

• curprev 09:4209:42, 4 July 2013 Nathan wailes talk contribs 1,147 bytes +15 No edit summary

4 July 2011

• curprev 13:5613:56, 4 July 2011 Joshxiong talk contribs m 1,132 bytes +19 →See also

4 February 2011

• curprev 14:0614:06, 4 February 2011 Jhggins talk contribs 1,113 bytes −10 No edit summary
• curprev 14:0514:05, 4 February 2011 Jhggins talk contribs 1,123 bytes +86 →Solution
• curprev 14:0314:03, 4 February 2011 Jhggins talk contribs 1,037 bytes +593 →Solution
• curprev 13:5113:51, 4 February 2011 Jhggins talk contribs 444 bytes +350 →Problem

26 March 2010

• curprev 11:3011:30, 26 March 2010 YottaByte talk contribs m 94 bytes +21 No edit summary

10 July 2006

• curprev 10:1710:17, 10 July 2006 Joml88 talk contribs m 73 bytes 0 2005 AMC 12B Problem 21 moved to 2005 AMC 12B Problems/Problem 21

30 June 2006

• curprev 16:0816:08, 30 June 2006 Matt276eagles talk contribs 73 bytes +73 No edit summary