18638165

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{137}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 29092608

約数和(自身を除く): 10454443

約数列:

[1, 5, 7, 13, 23, 35, 65, 91, 115, 137, 161, 169, 299, 455, 685, 805, 845, 959, 1183, 1495, 1781, 2093, 3151, 3887, 4795, 5915, 8905, 10465, 12467, 15755, 19435, 22057, 23153, 27209, 40963, 62335, 110285, 115765, 136045, 162071, 204815, 286741, 532519, 810355, 1433705, 2662595, 3727633, 18638165]

約数ペア:

[(1, 18638165), (5, 3727633), (7, 2662595), (13, 1433705), (23, 810355), (35, 532519), (65, 286741), (91, 204815), (115, 162071), (137, 136045), (161, 115765), (169, 110285), (299, 62335), (455, 40963), (685, 27209), (805, 23153), (845, 22057), (959, 19435), (1183, 15755), (1495, 12467), (1781, 10465), (2093, 8905), (3151, 5915), (3887, 4795)]