19965421

素因数分解:

$7^1\times {\mathrm{109}}^1\times {\mathrm{137}}^1\times {\mathrm{191}}^1$

素因数の和:444

約数の個数: 16

約数和(自身を含む): 23316480

約数和(自身を除く): 3351059

約数列:

[1, 7, 109, 137, 191, 763, 959, 1337, 14933, 20819, 26167, 104531, 145733, 183169, 2852203, 19965421]

約数ペア:

[(1, 19965421), (7, 2852203), (109, 183169), (137, 145733), (191, 104531), (763, 26167), (959, 20819), (1337, 14933)]