19957399

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{191}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 26542080

約数和(自身を除く): 6584681

約数列:

[1, 7, 11, 23, 59, 77, 161, 191, 253, 413, 649, 1337, 1357, 1771, 2101, 4393, 4543, 9499, 11269, 14707, 14927, 30751, 48323, 78883, 104489, 123959, 259187, 338261, 867713, 1814309, 2851057, 19957399]

約数ペア:

[(1, 19957399), (7, 2851057), (11, 1814309), (23, 867713), (59, 338261), (77, 259187), (161, 123959), (191, 104489), (253, 78883), (413, 48323), (649, 30751), (1337, 14927), (1357, 14707), (1771, 11269), (2101, 9499), (4393, 4543)]