21655140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27763}}^1$

素因数の和:27788

約数の個数: 48

約数和(自身を含む): 65300928

約数和(自身を除く): 43645788

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27763, 55526, 83289, 111052, 138815, 166578, 277630, 333156, 360919, 416445, 555260, 721838, 832890, 1082757, 1443676, 1665780, 1804595, 2165514, 3609190, 4331028, 5413785, 7218380, 10827570, 21655140]

約数ペア:

[(1, 21655140), (2, 10827570), (3, 7218380), (4, 5413785), (5, 4331028), (6, 3609190), (10, 2165514), (12, 1804595), (13, 1665780), (15, 1443676), (20, 1082757), (26, 832890), (30, 721838), (39, 555260), (52, 416445), (60, 360919), (65, 333156), (78, 277630), (130, 166578), (156, 138815), (195, 111052), (260, 83289), (390, 55526), (780, 27763)]