21321339

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{2591}}^1$

素因数の和:2818

約数の個数: 16

約数和(自身を含む): 30772224

約数和(自身を除く): 9450885

約数列:

[1, 3, 13, 39, 211, 633, 2591, 2743, 7773, 8229, 33683, 101049, 546701, 1640103, 7107113, 21321339]

約数ペア:

[(1, 21321339), (3, 7107113), (13, 1640103), (39, 546701), (211, 101049), (633, 33683), (2591, 8229), (2743, 7773)]