21108685

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 28651392

約数和(自身を除く): 7542707

約数列:

[1, 5, 13, 37, 65, 67, 131, 185, 335, 481, 655, 871, 1703, 2405, 2479, 4355, 4847, 8515, 8777, 12395, 24235, 32227, 43885, 63011, 114101, 161135, 315055, 324749, 570505, 1623745, 4221737, 21108685]

約数ペア:

[(1, 21108685), (5, 4221737), (13, 1623745), (37, 570505), (65, 324749), (67, 315055), (131, 161135), (185, 114101), (335, 63011), (481, 43885), (655, 32227), (871, 24235), (1703, 12395), (2405, 8777), (2479, 8515), (4355, 4847)]