21243729

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28669}}^1$

素因数の和:28704

約数の個数: 16

約数和(自身を含む): 32110400

約数和(自身を除く): 10866671

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28669, 86007, 372697, 544711, 1118091, 1634133, 7081243, 21243729]

約数ペア:

[(1, 21243729), (3, 7081243), (13, 1634133), (19, 1118091), (39, 544711), (57, 372697), (247, 86007), (741, 28669)]