21189051

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13931}}^1$

素因数の和:13963

約数の個数: 18

約数和(自身を含む): 33144228

約数和(自身を除く): 11955177

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13931, 41793, 125379, 181103, 543309, 1629927, 2354339, 7063017, 21189051]

約数ペア:

[(1, 21189051), (3, 7063017), (9, 2354339), (13, 1629927), (39, 543309), (117, 181103), (169, 125379), (507, 41793), (1521, 13931)]