21258872

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{139861}}^1$

素因数の和:139886

約数の個数: 16

約数和(自身を含む): 41958600

約数和(自身を除く): 20699728

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 139861, 279722, 559444, 1118888, 2657359, 5314718, 10629436, 21258872]

約数ペア:

[(1, 21258872), (2, 10629436), (4, 5314718), (8, 2657359), (19, 1118888), (38, 559444), (76, 279722), (152, 139861)]