21813220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{263}}^1$

素因数の和:325

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 34070300

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 29, 44, 52, 55, 58, 65, 110, 116, 130, 143, 145, 220, 260, 263, 286, 290, 319, 377, 526, 572, 580, 638, 715, 754, 1052, 1276, 1315, 1430, 1508, 1595, 1885, 2630, 2860, 2893, 3190, 3419, 3770, 4147, 5260, 5786, 6380, 6838, 7540, 7627, 8294, 11572, 13676, 14465, 15254, 16588, 17095, 20735, 28930, 30508, 34190, 37609, 38135, 41470, 57860, 68380, 75218, 76270, 82940, 83897, 99151, 150436, 152540, 167794, 188045, 198302, 335588, 376090, 396604, 419485, 495755, 752180, 838970, 991510, 1090661, 1677940, 1983020, 2181322, 4362644, 5453305, 10906610, 21813220]

約数ペア:

[(1, 21813220), (2, 10906610), (4, 5453305), (5, 4362644), (10, 2181322), (11, 1983020), (13, 1677940), (20, 1090661), (22, 991510), (26, 838970), (29, 752180), (44, 495755), (52, 419485), (55, 396604), (58, 376090), (65, 335588), (110, 198302), (116, 188045), (130, 167794), (143, 152540), (145, 150436), (220, 99151), (260, 83897), (263, 82940), (286, 76270), (290, 75218), (319, 68380), (377, 57860), (526, 41470), (572, 38135), (580, 37609), (638, 34190), (715, 30508), (754, 28930), (1052, 20735), (1276, 17095), (1315, 16588), (1430, 15254), (1508, 14465), (1595, 13676), (1885, 11572), (2630, 8294), (2860, 7627), (2893, 7540), (3190, 6838), (3419, 6380), (3770, 5786), (4147, 5260)]