20918480

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{2161}}^1$

素因数の和:2196

約数の個数: 60

約数和(自身を含む): 53483556

約数和(自身を除く): 32565076

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 121, 176, 220, 242, 440, 484, 605, 880, 968, 1210, 1936, 2161, 2420, 4322, 4840, 8644, 9680, 10805, 17288, 21610, 23771, 34576, 43220, 47542, 86440, 95084, 118855, 172880, 190168, 237710, 261481, 380336, 475420, 522962, 950840, 1045924, 1307405, 1901680, 2091848, 2614810, 4183696, 5229620, 10459240, 20918480]

約数ペア:

[(1, 20918480), (2, 10459240), (4, 5229620), (5, 4183696), (8, 2614810), (10, 2091848), (11, 1901680), (16, 1307405), (20, 1045924), (22, 950840), (40, 522962), (44, 475420), (55, 380336), (80, 261481), (88, 237710), (110, 190168), (121, 172880), (176, 118855), (220, 95084), (242, 86440), (440, 47542), (484, 43220), (605, 34576), (880, 23771), (968, 21610), (1210, 17288), (1936, 10805), (2161, 9680), (2420, 8644), (4322, 4840)]