87217960

素因数分解:

$2^3\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{2161}}^1$

素因数の和:3181

約数の個数: 32

約数和(自身を含む): 196525800

約数和(自身を除く): 109307840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1009, 2018, 2161, 4036, 4322, 5045, 8072, 8644, 10090, 10805, 17288, 20180, 21610, 40360, 43220, 86440, 2180449, 4360898, 8721796, 10902245, 17443592, 21804490, 43608980, 87217960]

約数ペア:

[(1, 87217960), (2, 43608980), (4, 21804490), (5, 17443592), (8, 10902245), (10, 8721796), (20, 4360898), (40, 2180449), (1009, 86440), (2018, 43220), (2161, 40360), (4036, 21610), (4322, 20180), (5045, 17288), (8072, 10805), (8644, 10090)]