28390257

素因数分解:

$3^4\times 7^2\times {\mathrm{23}}^1\times {\mathrm{311}}^1$

素因数の和:360

約数の個数: 60

約数和(自身を含む): 51644736

約数和(自身を除く): 23254479

約数列:

[1, 3, 7, 9, 21, 23, 27, 49, 63, 69, 81, 147, 161, 189, 207, 311, 441, 483, 567, 621, 933, 1127, 1323, 1449, 1863, 2177, 2799, 3381, 3969, 4347, 6531, 7153, 8397, 10143, 13041, 15239, 19593, 21459, 25191, 30429, 45717, 50071, 58779, 64377, 91287, 137151, 150213, 176337, 193131, 350497, 411453, 450639, 579393, 1051491, 1234359, 1351917, 3154473, 4055751, 9463419, 28390257]

約数ペア:

[(1, 28390257), (3, 9463419), (7, 4055751), (9, 3154473), (21, 1351917), (23, 1234359), (27, 1051491), (49, 579393), (63, 450639), (69, 411453), (81, 350497), (147, 193131), (161, 176337), (189, 150213), (207, 137151), (311, 91287), (441, 64377), (483, 58779), (567, 50071), (621, 45717), (933, 30429), (1127, 25191), (1323, 21459), (1449, 19593), (1863, 15239), (2177, 13041), (2799, 10143), (3381, 8397), (3969, 7153), (4347, 6531)]