28208817

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:164

約数の個数: 80

約数和(自身を含む): 53665920

約数和(自身を除く): 25457103

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 43, 63, 81, 89, 91, 117, 129, 189, 267, 273, 301, 351, 387, 559, 567, 623, 801, 819, 903, 1053, 1157, 1161, 1677, 1869, 2403, 2457, 2709, 3471, 3483, 3827, 3913, 5031, 5607, 7209, 7371, 8099, 8127, 10413, 11481, 11739, 15093, 16821, 24297, 24381, 26789, 31239, 34443, 35217, 45279, 49751, 50463, 72891, 80367, 93717, 103329, 105651, 149253, 218673, 241101, 309987, 316953, 348257, 447759, 656019, 723303, 1044771, 1343277, 2169909, 3134313, 4029831, 9402939, 28208817]

約数ペア:

[(1, 28208817), (3, 9402939), (7, 4029831), (9, 3134313), (13, 2169909), (21, 1343277), (27, 1044771), (39, 723303), (43, 656019), (63, 447759), (81, 348257), (89, 316953), (91, 309987), (117, 241101), (129, 218673), (189, 149253), (267, 105651), (273, 103329), (301, 93717), (351, 80367), (387, 72891), (559, 50463), (567, 49751), (623, 45279), (801, 35217), (819, 34443), (903, 31239), (1053, 26789), (1157, 24381), (1161, 24297), (1677, 16821), (1869, 15093), (2403, 11739), (2457, 11481), (2709, 10413), (3471, 8127), (3483, 8099), (3827, 7371), (3913, 7209), (5031, 5607)]