21270920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1667}}^1$

素因数の和:1718

約数の個数: 64

約数和(自身を含む): 54043200

約数和(自身を除く): 32772280

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1595, 1667, 2552, 3190, 3334, 6380, 6668, 8335, 12760, 13336, 16670, 18337, 33340, 36674, 48343, 66680, 73348, 91685, 96686, 146696, 183370, 193372, 241715, 366740, 386744, 483430, 531773, 733480, 966860, 1063546, 1933720, 2127092, 2658865, 4254184, 5317730, 10635460, 21270920]

約数ペア:

[(1, 21270920), (2, 10635460), (4, 5317730), (5, 4254184), (8, 2658865), (10, 2127092), (11, 1933720), (20, 1063546), (22, 966860), (29, 733480), (40, 531773), (44, 483430), (55, 386744), (58, 366740), (88, 241715), (110, 193372), (116, 183370), (145, 146696), (220, 96686), (232, 91685), (290, 73348), (319, 66680), (440, 48343), (580, 36674), (638, 33340), (1160, 18337), (1276, 16670), (1595, 13336), (1667, 12760), (2552, 8335), (3190, 6668), (3334, 6380)]