21003059

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{137}}^1\times {\mathrm{181}}^1$

素因数の和:347

約数の個数: 24

約数和(自身を含む): 26723424

約数和(自身を除く): 5720365

約数列:

[1, 7, 11, 77, 121, 137, 181, 847, 959, 1267, 1507, 1991, 10549, 13937, 16577, 21901, 24797, 116039, 153307, 173579, 272767, 1909369, 3000437, 21003059]

約数ペア:

[(1, 21003059), (7, 3000437), (11, 1909369), (77, 272767), (121, 173579), (137, 153307), (181, 116039), (847, 24797), (959, 21901), (1267, 16577), (1507, 13937), (1991, 10549)]