21299551

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{127}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 28098560

約数和(自身を除く): 6799009

約数列:

[1, 7, 13, 19, 91, 97, 127, 133, 247, 679, 889, 1261, 1651, 1729, 1843, 2413, 8827, 11557, 12319, 12901, 16891, 23959, 31369, 86233, 160147, 167713, 219583, 234061, 1121029, 1638427, 3042793, 21299551]

約数ペア:

[(1, 21299551), (7, 3042793), (13, 1638427), (19, 1121029), (91, 234061), (97, 219583), (127, 167713), (133, 160147), (247, 86233), (679, 31369), (889, 23959), (1261, 16891), (1651, 12901), (1729, 12319), (1843, 11557), (2413, 8827)]