20931669

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:223

約数の個数: 48

約数和(自身を含む): 35112000

約数和(自身を除く): 14180331

約数列:

[1, 3, 9, 11, 27, 33, 43, 99, 121, 129, 149, 297, 363, 387, 447, 473, 1089, 1161, 1341, 1419, 1639, 3267, 4023, 4257, 4917, 5203, 6407, 12771, 14751, 15609, 18029, 19221, 44253, 46827, 54087, 57663, 70477, 140481, 162261, 172989, 211431, 486783, 634293, 775247, 1902879, 2325741, 6977223, 20931669]

約数ペア:

[(1, 20931669), (3, 6977223), (9, 2325741), (11, 1902879), (27, 775247), (33, 634293), (43, 486783), (99, 211431), (121, 172989), (129, 162261), (149, 140481), (297, 70477), (363, 57663), (387, 54087), (447, 46827), (473, 44253), (1089, 19221), (1161, 18029), (1341, 15609), (1419, 14751), (1639, 12771), (3267, 6407), (4023, 5203), (4257, 4917)]