21979111

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{397}}^1\times {\mathrm{719}}^1$

素因数の和:1134

約数の個数: 16

約数和(自身を含む): 27509760

約数和(自身を除く): 5530649

約数列:

[1, 7, 11, 77, 397, 719, 2779, 4367, 5033, 7909, 30569, 55363, 285443, 1998101, 3139873, 21979111]

約数ペア:

[(1, 21979111), (7, 3139873), (11, 1998101), (77, 285443), (397, 55363), (719, 30569), (2779, 7909), (4367, 5033)]