Talk:Abundant odd numbers: Difference between revisions
Apparent reason for discrepancy in 1000th odd number.
m (→Abundant numbers: added comments, beating a dead horse.) |
(Apparent reason for discrepancy in 1000th odd number.) |
||
Line 52:
:Looks good enough to me. I've updated the Go entry to match. BTW getting a different answer to you for the 1000th abundant odd number. According to my reckoning, 498225 is the 1012th.--[[User:PureFox|PureFox]] ([[User talk:PureFox|talk]]) 22:03, 17 May 2019 (UTC)
:The problem seems to be that you (and also Gerard) are assuming that all the odd numbers will end in 5 when in fact there are a few which end in 1, 3, 7 or 9.
:The first such number is 81081 whose proper divisors are:
:1 + 3 + 7 + 9 + 11 + 13 + 21 + 27 + 33 + 39 + 63 + 77 + 81 + 91 + 99 + 117 + 143 + 189 + 231 + 273 + 297 + 351 + 429 + 567 + 693 + 819 + 891 + 1001 + 1053 + 1287 + 2079 + 2457 + 3003 + 3861 + 6237 + 7371 + 9009 + 11583 + 27027, which sum to 81543. So it's definitely an abundant odd number.
: The other 11 are: 153153, 171171, 189189, 207207, 223839, 243243, 261261, 279279, 297297, 351351 and 459459. --[[User:PureFox|PureFox]] ([[User talk:PureFox|talk]]) 23:47, 17 May 2019 (UTC)
| |||