20781617731

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{2187769}}^1$

素因数の和:2187858

約数の個数: 16

約数和(自身を含む): 25203110400

約数和(自身を除く): 4421492669

約数列:

[1, 7, 23, 59, 161, 413, 1357, 9499, 2187769, 15314383, 50318687, 129078371, 352230809, 903548597, 2968802533, 20781617731]

約数ペア:

[(1, 20781617731), (7, 2968802533), (23, 903548597), (59, 352230809), (161, 129078371), (413, 50318687), (1357, 15314383), (9499, 2187769)]