20998538

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{6967}}^1$

素因数の和:7117

約数の個数: 16

約数和(自身を含む): 34617024

約数和(自身を除く): 13618486

約数列:

[1, 2, 11, 22, 137, 274, 1507, 3014, 6967, 13934, 76637, 153274, 954479, 1908958, 10499269, 20998538]

約数ペア:

[(1, 20998538), (2, 10499269), (11, 1908958), (22, 954479), (137, 153274), (274, 76637), (1507, 13934), (3014, 6967)]