21009079

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{419}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 28224000

約数和(自身を除く): 7214921

約数列:

[1, 7, 13, 19, 29, 91, 133, 203, 247, 377, 419, 551, 1729, 2639, 2933, 3857, 5447, 7163, 7961, 12151, 38129, 50141, 55727, 85057, 103493, 157963, 230869, 724451, 1105741, 1616083, 3001297, 21009079]

約数ペア:

[(1, 21009079), (7, 3001297), (13, 1616083), (19, 1105741), (29, 724451), (91, 230869), (133, 157963), (203, 103493), (247, 85057), (377, 55727), (419, 50141), (551, 38129), (1729, 12151), (2639, 7961), (2933, 7163), (3857, 5447)]