20813548

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{293}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 43464960

約数和(自身を除く): 22651412

約数列:

[1, 2, 4, 7, 14, 28, 43, 59, 86, 118, 172, 236, 293, 301, 413, 586, 602, 826, 1172, 1204, 1652, 2051, 2537, 4102, 5074, 8204, 10148, 12599, 17287, 17759, 25198, 34574, 35518, 50396, 69148, 71036, 88193, 121009, 176386, 242018, 352772, 484036, 743341, 1486682, 2973364, 5203387, 10406774, 20813548]

約数ペア:

[(1, 20813548), (2, 10406774), (4, 5203387), (7, 2973364), (14, 1486682), (28, 743341), (43, 484036), (59, 352772), (86, 242018), (118, 176386), (172, 121009), (236, 88193), (293, 71036), (301, 69148), (413, 50396), (586, 35518), (602, 34574), (826, 25198), (1172, 17759), (1204, 17287), (1652, 12599), (2051, 10148), (2537, 8204), (4102, 5074)]