21247236815

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{318001}}^1$

素因数の和:318119

約数の個数: 32

約数和(自身を含む): 30772417536

約数和(自身を除く): 9525180721

約数列:

[1, 5, 7, 23, 35, 83, 115, 161, 415, 581, 805, 1909, 2905, 9545, 13363, 66815, 318001, 1590005, 2226007, 7314023, 11130035, 26394083, 36570115, 51198161, 131970415, 184758581, 255990805, 607063909, 923792905, 3035319545, 4249447363, 21247236815]

約数ペア:

[(1, 21247236815), (5, 4249447363), (7, 3035319545), (23, 923792905), (35, 607063909), (83, 255990805), (115, 184758581), (161, 131970415), (415, 51198161), (581, 36570115), (805, 26394083), (1909, 11130035), (2905, 7314023), (9545, 2226007), (13363, 1590005), (66815, 318001)]