20991432009

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{2811227}}^1$

素因数の和:2811380

約数の個数: 16

約数和(自身を含む): 29686567680

約数和(自身を除く): 8695135671

約数列:

[1, 3, 19, 57, 131, 393, 2489, 7467, 2811227, 8433681, 53413313, 160239939, 368270737, 1104812211, 6997144003, 20991432009]

約数ペア:

[(1, 20991432009), (3, 6997144003), (19, 1104812211), (57, 368270737), (131, 160239939), (393, 53413313), (2489, 8433681), (7467, 2811227)]