21001409

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{163}}^1$

素因数の和:257

約数の個数: 32

約数和(自身を含む): 26780544

約数和(自身を除く): 5779135

約数列:

[1, 11, 13, 17, 53, 143, 163, 187, 221, 583, 689, 901, 1793, 2119, 2431, 2771, 7579, 8639, 9911, 11713, 23309, 30481, 36023, 95029, 112307, 128843, 146863, 396253, 1235377, 1615493, 1909219, 21001409]

約数ペア:

[(1, 21001409), (11, 1909219), (13, 1615493), (17, 1235377), (53, 396253), (143, 146863), (163, 128843), (187, 112307), (221, 95029), (583, 36023), (689, 30481), (901, 23309), (1793, 11713), (2119, 9911), (2431, 8639), (2771, 7579)]