21408309

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{2731}}^1$

素因数の和:2817

約数の個数: 24

約数和(自身を含む): 33811232

約数和(自身を除く): 12402923

約数列:

[1, 3, 9, 13, 39, 67, 117, 201, 603, 871, 2613, 2731, 7839, 8193, 24579, 35503, 106509, 182977, 319527, 548931, 1646793, 2378701, 7136103, 21408309]

約数ペア:

[(1, 21408309), (3, 7136103), (9, 2378701), (13, 1646793), (39, 548931), (67, 319527), (117, 182977), (201, 106509), (603, 35503), (871, 24579), (2613, 8193), (2731, 7839)]