21821891

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{8269}}^1$

素因数の和:8318

約数の個数: 16

約数和(自身を含む): 27787200

約数和(自身を除く): 5965309

約数列:

[1, 7, 13, 29, 91, 203, 377, 2639, 8269, 57883, 107497, 239801, 752479, 1678607, 3117413, 21821891]

約数ペア:

[(1, 21821891), (7, 3117413), (13, 1678607), (29, 752479), (91, 239801), (203, 107497), (377, 57883), (2639, 8269)]