19987991199

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{201898901}}^1$

素因数の和:201898918

約数の個数: 12

約数和(自身を含む): 31496228712

約数和(自身を除く): 11508237513

約数列:

[1, 3, 9, 11, 33, 99, 201898901, 605696703, 1817090109, 2220887911, 6662663733, 19987991199]

約数ペア:

[(1, 19987991199), (3, 6662663733), (9, 2220887911), (11, 1817090109), (33, 605696703), (99, 201898901)]