21905169

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{51061}}^1$

素因数の和:51088

約数の個数: 16

約数和(自身を含む): 34313664

約数和(自身を除く): 12408495

約数列:

[1, 3, 11, 13, 33, 39, 143, 429, 51061, 153183, 561671, 663793, 1685013, 1991379, 7301723, 21905169]

約数ペア:

[(1, 21905169), (3, 7301723), (11, 1991379), (13, 1685013), (33, 663793), (39, 561671), (143, 153183), (429, 51061)]