28255773

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:178

約数の個数: 64

約数和(自身を含む): 49674240

約数和(自身を除く): 21418467

約数列:

[1, 3, 7, 13, 21, 29, 39, 43, 83, 87, 91, 129, 203, 249, 273, 301, 377, 559, 581, 609, 903, 1079, 1131, 1247, 1677, 1743, 2407, 2639, 3237, 3569, 3741, 3913, 7221, 7553, 7917, 8729, 10707, 11739, 16211, 16849, 22659, 24983, 26187, 31291, 46397, 48633, 50547, 74949, 93873, 103501, 113477, 139191, 219037, 310503, 324779, 340431, 657111, 724507, 974337, 1345513, 2173521, 4036539, 9418591, 28255773]

約数ペア:

[(1, 28255773), (3, 9418591), (7, 4036539), (13, 2173521), (21, 1345513), (29, 974337), (39, 724507), (43, 657111), (83, 340431), (87, 324779), (91, 310503), (129, 219037), (203, 139191), (249, 113477), (273, 103501), (301, 93873), (377, 74949), (559, 50547), (581, 48633), (609, 46397), (903, 31291), (1079, 26187), (1131, 24983), (1247, 22659), (1677, 16849), (1743, 16211), (2407, 11739), (2639, 10707), (3237, 8729), (3569, 7917), (3741, 7553), (3913, 7221)]