28239939

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{41}}^1$

素因数の和:125

約数の個数: 72

約数和(自身を含む): 53263392

約数和(自身を除く): 25023453

約数列:

[1, 3, 7, 9, 13, 21, 29, 39, 41, 63, 87, 91, 117, 123, 203, 261, 273, 287, 369, 377, 533, 609, 819, 841, 861, 1131, 1189, 1599, 1827, 2523, 2583, 2639, 3393, 3567, 3731, 4797, 5887, 7569, 7917, 8323, 10701, 10933, 11193, 15457, 17661, 23751, 24969, 32799, 33579, 34481, 46371, 52983, 74907, 76531, 98397, 103443, 108199, 139113, 229593, 241367, 310329, 324597, 448253, 688779, 724101, 973791, 1344759, 2172303, 3137771, 4034277, 9413313, 28239939]

約数ペア:

[(1, 28239939), (3, 9413313), (7, 4034277), (9, 3137771), (13, 2172303), (21, 1344759), (29, 973791), (39, 724101), (41, 688779), (63, 448253), (87, 324597), (91, 310329), (117, 241367), (123, 229593), (203, 139113), (261, 108199), (273, 103443), (287, 98397), (369, 76531), (377, 74907), (533, 52983), (609, 46371), (819, 34481), (841, 33579), (861, 32799), (1131, 24969), (1189, 23751), (1599, 17661), (1827, 15457), (2523, 11193), (2583, 10933), (2639, 10701), (3393, 8323), (3567, 7917), (3731, 7569), (4797, 5887)]