21523455

素因数分解:

$3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:221

約数の個数: 64

約数和(自身を含む): 40857600

約数和(自身を除く): 19334145

約数列:

[1, 3, 5, 9, 15, 27, 31, 37, 45, 93, 111, 135, 139, 155, 185, 279, 333, 417, 465, 555, 695, 837, 999, 1147, 1251, 1395, 1665, 2085, 3441, 3753, 4185, 4309, 4995, 5143, 5735, 6255, 10323, 12927, 15429, 17205, 18765, 21545, 25715, 30969, 38781, 46287, 51615, 64635, 77145, 116343, 138861, 154845, 159433, 193905, 231435, 478299, 581715, 694305, 797165, 1434897, 2391495, 4304691, 7174485, 21523455]

約数ペア:

[(1, 21523455), (3, 7174485), (5, 4304691), (9, 2391495), (15, 1434897), (27, 797165), (31, 694305), (37, 581715), (45, 478299), (93, 231435), (111, 193905), (135, 159433), (139, 154845), (155, 138861), (185, 116343), (279, 77145), (333, 64635), (417, 51615), (465, 46287), (555, 38781), (695, 30969), (837, 25715), (999, 21545), (1147, 18765), (1251, 17205), (1395, 15429), (1665, 12927), (2085, 10323), (3441, 6255), (3753, 5735), (4185, 5143), (4309, 4995)]