21328021

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 26812800

約数和(自身を除く): 5484779

約数列:

[1, 11, 13, 29, 37, 139, 143, 319, 377, 407, 481, 1073, 1529, 1807, 4031, 4147, 5143, 5291, 11803, 13949, 19877, 44341, 52403, 56573, 66859, 149147, 153439, 576433, 735449, 1640617, 1938911, 21328021]

約数ペア:

[(1, 21328021), (11, 1938911), (13, 1640617), (29, 735449), (37, 576433), (139, 153439), (143, 149147), (319, 66859), (377, 56573), (407, 52403), (481, 44341), (1073, 19877), (1529, 13949), (1807, 11803), (4031, 5291), (4147, 5143)]