21559811

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{2999}}^1$

素因数の和:3098

約数の個数: 16

約数和(自身を含む): 26880000

約数和(自身を除く): 5320189

約数列:

[1, 7, 13, 79, 91, 553, 1027, 2999, 7189, 20993, 38987, 236921, 272909, 1658447, 3079973, 21559811]

約数ペア:

[(1, 21559811), (7, 3079973), (13, 1658447), (79, 272909), (91, 236921), (553, 38987), (1027, 20993), (2999, 7189)]