20809341

素因数分解:

$3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{2411}}^1$

素因数の和:2561

約数の個数: 24

約数和(自身を含む): 34617024

約数和(自身を除く): 13807683

約数列:

[1, 3, 7, 9, 21, 63, 137, 411, 959, 1233, 2411, 2877, 7233, 8631, 16877, 21699, 50631, 151893, 330307, 990921, 2312149, 2972763, 6936447, 20809341]

約数ペア:

[(1, 20809341), (3, 6936447), (7, 2972763), (9, 2312149), (21, 990921), (63, 330307), (137, 151893), (411, 50631), (959, 21699), (1233, 16877), (2411, 8631), (2877, 7233)]