21554360

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{359}}^1$

素因数の和:468

約数の個数: 64

約数和(自身を含む): 51840000

約数和(自身を除く): 30285640

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 79, 95, 152, 158, 190, 316, 359, 380, 395, 632, 718, 760, 790, 1436, 1501, 1580, 1795, 2872, 3002, 3160, 3590, 6004, 6821, 7180, 7505, 12008, 13642, 14360, 15010, 27284, 28361, 30020, 34105, 54568, 56722, 60040, 68210, 113444, 136420, 141805, 226888, 272840, 283610, 538859, 567220, 1077718, 1134440, 2155436, 2694295, 4310872, 5388590, 10777180, 21554360]

約数ペア:

[(1, 21554360), (2, 10777180), (4, 5388590), (5, 4310872), (8, 2694295), (10, 2155436), (19, 1134440), (20, 1077718), (38, 567220), (40, 538859), (76, 283610), (79, 272840), (95, 226888), (152, 141805), (158, 136420), (190, 113444), (316, 68210), (359, 60040), (380, 56722), (395, 54568), (632, 34105), (718, 30020), (760, 28361), (790, 27284), (1436, 15010), (1501, 14360), (1580, 13642), (1795, 12008), (2872, 7505), (3002, 7180), (3160, 6821), (3590, 6004)]