20989339

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{233}}^1\times {\mathrm{757}}^1$

素因数の和:1014

約数の個数: 16

約数和(自身を含む): 25541568

約数和(自身を除く): 4552229

約数列:

[1, 7, 17, 119, 233, 757, 1631, 3961, 5299, 12869, 27727, 90083, 176381, 1234667, 2998477, 20989339]

約数ペア:

[(1, 20989339), (7, 2998477), (17, 1234667), (119, 176381), (233, 90083), (757, 27727), (1631, 12869), (3961, 5299)]