20765195

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{641}}^1$

素因数の和:707

約数の個数: 32

約数和(自身を含む): 29583360

約数和(自身を除く): 8818165

約数列:

[1, 5, 11, 19, 31, 55, 95, 155, 209, 341, 589, 641, 1045, 1705, 2945, 3205, 6479, 7051, 12179, 19871, 32395, 35255, 60895, 99355, 133969, 218581, 377549, 669845, 1092905, 1887745, 4153039, 20765195]

約数ペア:

[(1, 20765195), (5, 4153039), (11, 1887745), (19, 1092905), (31, 669845), (55, 377549), (95, 218581), (155, 133969), (209, 99355), (341, 60895), (589, 35255), (641, 32395), (1045, 19871), (1705, 12179), (2945, 7051), (3205, 6479)]