21070189

素因数分解:

$7^1\times {\mathrm{127}}^1\times {\mathrm{137}}^1\times {\mathrm{173}}^1$

素因数の和:444

約数の個数: 16

約数和(自身を含む): 24588288

約数和(自身を除く): 3518099

約数列:

[1, 7, 127, 137, 173, 889, 959, 1211, 17399, 21971, 23701, 121793, 153797, 165907, 3010027, 21070189]

約数ペア:

[(1, 21070189), (7, 3010027), (127, 165907), (137, 153797), (173, 121793), (889, 23701), (959, 21971), (1211, 17399)]