21389577

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{15809}}^1$

素因数の和:15864

約数の個数: 16

約数和(自身を含む): 31872960

約数和(自身を除く): 10483383

約数列:

[1, 3, 11, 33, 41, 123, 451, 1353, 15809, 47427, 173899, 521697, 648169, 1944507, 7129859, 21389577]

約数ペア:

[(1, 21389577), (3, 7129859), (11, 1944507), (33, 648169), (41, 521697), (123, 173899), (451, 47427), (1353, 15809)]