20985356

素因数分解:

$2^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{12703}}^1$

素因数の和:12773

約数の個数: 24

約数和(自身を含む): 42685440

約数和(自身を除く): 21700084

約数列:

[1, 2, 4, 7, 14, 28, 59, 118, 236, 413, 826, 1652, 12703, 25406, 50812, 88921, 177842, 355684, 749477, 1498954, 2997908, 5246339, 10492678, 20985356]

約数ペア:

[(1, 20985356), (2, 10492678), (4, 5246339), (7, 2997908), (14, 1498954), (28, 749477), (59, 355684), (118, 177842), (236, 88921), (413, 50812), (826, 25406), (1652, 12703)]