21911211

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{179}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 38188800

約数和(自身を除く): 16277589

約数列:

[1, 3, 7, 9, 21, 29, 63, 67, 87, 179, 201, 203, 261, 469, 537, 603, 609, 1253, 1407, 1611, 1827, 1943, 3759, 4221, 5191, 5829, 11277, 11993, 13601, 15573, 17487, 35979, 36337, 40803, 46719, 83951, 107937, 109011, 122409, 251853, 327033, 347797, 755559, 1043391, 2434579, 3130173, 7303737, 21911211]

約数ペア:

[(1, 21911211), (3, 7303737), (7, 3130173), (9, 2434579), (21, 1043391), (29, 755559), (63, 347797), (67, 327033), (87, 251853), (179, 122409), (201, 109011), (203, 107937), (261, 83951), (469, 46719), (537, 40803), (603, 36337), (609, 35979), (1253, 17487), (1407, 15573), (1611, 13601), (1827, 11993), (1943, 11277), (3759, 5829), (4221, 5191)]