21270535

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{419}}^1$

素因数の和:519

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 9211385

約数列:

[1, 5, 11, 13, 55, 65, 71, 143, 355, 419, 715, 781, 923, 2095, 3905, 4609, 4615, 5447, 10153, 23045, 27235, 29749, 50765, 59917, 148745, 299585, 327239, 386737, 1636195, 1933685, 4254107, 21270535]

約数ペア:

[(1, 21270535), (5, 4254107), (11, 1933685), (13, 1636195), (55, 386737), (65, 327239), (71, 299585), (143, 148745), (355, 59917), (419, 50765), (715, 29749), (781, 27235), (923, 23045), (2095, 10153), (3905, 5447), (4609, 4615)]