20939821

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{1567}}^1$

素因数の和:1680

約数の個数: 16

約数和(自身を含む): 25288704

約数和(自身を除く): 4348883

約数列:

[1, 7, 23, 83, 161, 581, 1567, 1909, 10969, 13363, 36041, 130061, 252287, 910427, 2991403, 20939821]

約数ペア:

[(1, 20939821), (7, 2991403), (23, 910427), (83, 252287), (161, 130061), (581, 36041), (1567, 13363), (1909, 10969)]