20617480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1279}}^1$

素因数の和:1334

約数の個数: 64

約数和(自身を含む): 51609600

約数和(自身を除く): 30992120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1240, 1279, 1612, 2015, 2558, 3224, 4030, 5116, 6395, 8060, 10232, 12790, 16120, 16627, 25580, 33254, 39649, 51160, 66508, 79298, 83135, 133016, 158596, 166270, 198245, 317192, 332540, 396490, 515437, 665080, 792980, 1030874, 1585960, 2061748, 2577185, 4123496, 5154370, 10308740, 20617480]

約数ペア:

[(1, 20617480), (2, 10308740), (4, 5154370), (5, 4123496), (8, 2577185), (10, 2061748), (13, 1585960), (20, 1030874), (26, 792980), (31, 665080), (40, 515437), (52, 396490), (62, 332540), (65, 317192), (104, 198245), (124, 166270), (130, 158596), (155, 133016), (248, 83135), (260, 79298), (310, 66508), (403, 51160), (520, 39649), (620, 33254), (806, 25580), (1240, 16627), (1279, 16120), (1612, 12790), (2015, 10232), (2558, 8060), (3224, 6395), (4030, 5116)]