21279921

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{14747}}^1$

素因数の和:14800

約数の個数: 16

約数和(自身を含む): 31383744

約数和(自身を除く): 10103823

約数列:

[1, 3, 13, 37, 39, 111, 481, 1443, 14747, 44241, 191711, 545639, 575133, 1636917, 7093307, 21279921]

約数ペア:

[(1, 21279921), (3, 7093307), (13, 1636917), (37, 575133), (39, 545639), (111, 191711), (481, 44241), (1443, 14747)]