20680647440

素因数分解:

$2^4\times 5^1\times {\mathrm{911}}^1\times {\mathrm{283763}}^1$

素因数の和:284687

約数の個数: 40

約数和(自身を含む): 48135454848

約数和(自身を除く): 27454807408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 911, 1822, 3644, 4555, 7288, 9110, 14576, 18220, 36440, 72880, 283763, 567526, 1135052, 1418815, 2270104, 2837630, 4540208, 5675260, 11350520, 22701040, 258508093, 517016186, 1034032372, 1292540465, 2068064744, 2585080930, 4136129488, 5170161860, 10340323720, 20680647440]

約数ペア:

[(1, 20680647440), (2, 10340323720), (4, 5170161860), (5, 4136129488), (8, 2585080930), (10, 2068064744), (16, 1292540465), (20, 1034032372), (40, 517016186), (80, 258508093), (911, 22701040), (1822, 11350520), (3644, 5675260), (4555, 4540208), (7288, 2837630), (9110, 2270104), (14576, 1418815), (18220, 1135052), (36440, 567526), (72880, 283763)]