20489180

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{307}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 44706816

約数和(自身を除く): 24217636

約数列:

[1, 2, 4, 5, 10, 20, 47, 71, 94, 142, 188, 235, 284, 307, 355, 470, 614, 710, 940, 1228, 1420, 1535, 3070, 3337, 6140, 6674, 13348, 14429, 16685, 21797, 28858, 33370, 43594, 57716, 66740, 72145, 87188, 108985, 144290, 217970, 288580, 435940, 1024459, 2048918, 4097836, 5122295, 10244590, 20489180]

約数ペア:

[(1, 20489180), (2, 10244590), (4, 5122295), (5, 4097836), (10, 2048918), (20, 1024459), (47, 435940), (71, 288580), (94, 217970), (142, 144290), (188, 108985), (235, 87188), (284, 72145), (307, 66740), (355, 57716), (470, 43594), (614, 33370), (710, 28858), (940, 21797), (1228, 16685), (1420, 14429), (1535, 13348), (3070, 6674), (3337, 6140)]