21489377

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{479}}^1$

素因数の和:545

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7541023

約数列:

[1, 7, 13, 17, 29, 91, 119, 203, 221, 377, 479, 493, 1547, 2639, 3353, 3451, 6227, 6409, 8143, 13891, 43589, 44863, 57001, 97237, 105859, 180583, 236147, 741013, 1264081, 1653029, 3069911, 21489377]

約数ペア:

[(1, 21489377), (7, 3069911), (13, 1653029), (17, 1264081), (29, 741013), (91, 236147), (119, 180583), (203, 105859), (221, 97237), (377, 57001), (479, 44863), (493, 43589), (1547, 13891), (2639, 8143), (3353, 6409), (3451, 6227)]