201819457

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1\times {\mathrm{179}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 248832000

約数和(自身を除く): 47012543

約数列:

[1, 7, 23, 47, 149, 161, 179, 329, 1043, 1081, 1253, 3427, 4117, 7003, 7567, 8413, 23989, 26671, 28819, 49021, 58891, 161069, 186697, 193499, 613433, 1127483, 1253537, 1354493, 4294031, 8774759, 28831351, 201819457]

約数ペア:

[(1, 201819457), (7, 28831351), (23, 8774759), (47, 4294031), (149, 1354493), (161, 1253537), (179, 1127483), (329, 613433), (1043, 193499), (1081, 186697), (1253, 161069), (3427, 58891), (4117, 49021), (7003, 28819), (7567, 26671), (8413, 23989)]