20408980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24889}}^1$

素因数の和:24939

約数の個数: 24

約数和(自身を含む): 43905960

約数和(自身を除く): 23496980

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 24889, 49778, 99556, 124445, 248890, 497780, 1020449, 2040898, 4081796, 5102245, 10204490, 20408980]

約数ペア:

[(1, 20408980), (2, 10204490), (4, 5102245), (5, 4081796), (10, 2040898), (20, 1020449), (41, 497780), (82, 248890), (164, 124445), (205, 99556), (410, 49778), (820, 24889)]