19961305

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2309}}^1$

素因数の和:2353

約数の個数: 32

約数和(自身を含む): 31046400

約数和(自身を除く): 11085095

約数列:

[1, 5, 7, 13, 19, 35, 65, 91, 95, 133, 247, 455, 665, 1235, 1729, 2309, 8645, 11545, 16163, 30017, 43871, 80815, 150085, 210119, 219355, 307097, 570323, 1050595, 1535485, 2851615, 3992261, 19961305]

約数ペア:

[(1, 19961305), (5, 3992261), (7, 2851615), (13, 1535485), (19, 1050595), (35, 570323), (65, 307097), (91, 219355), (95, 210119), (133, 150085), (247, 80815), (455, 43871), (665, 30017), (1235, 16163), (1729, 11545), (2309, 8645)]