21080121

素因数分解:

$3^1\times {\mathrm{23}}^2\times {\mathrm{37}}^1\times {\mathrm{359}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 30260160

約数和(自身を除く): 9180039

約数列:

[1, 3, 23, 37, 69, 111, 359, 529, 851, 1077, 1587, 2553, 8257, 13283, 19573, 24771, 39849, 58719, 189911, 305509, 569733, 916527, 7026707, 21080121]

約数ペア:

[(1, 21080121), (3, 7026707), (23, 916527), (37, 569733), (69, 305509), (111, 189911), (359, 58719), (529, 39849), (851, 24771), (1077, 19573), (1587, 13283), (2553, 8257)]