18666921

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{677}}^1$

素因数の和:801

約数の個数: 32

約数和(自身を含む): 30981888

約数和(自身を除く): 12314967

約数列:

[1, 3, 7, 13, 21, 39, 91, 101, 273, 303, 677, 707, 1313, 2031, 2121, 3939, 4739, 8801, 9191, 14217, 26403, 27573, 61607, 68377, 184821, 205131, 478639, 888901, 1435917, 2666703, 6222307, 18666921]

約数ペア:

[(1, 18666921), (3, 6222307), (7, 2666703), (13, 1435917), (21, 888901), (39, 478639), (91, 205131), (101, 184821), (273, 68377), (303, 61607), (677, 27573), (707, 26403), (1313, 14217), (2031, 9191), (2121, 8801), (3939, 4739)]