21661461

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{311}}^1$

素因数の和:497

約数の個数: 24

約数和(自身を含む): 32123520

約数和(自身を除く): 10462059

約数列:

[1, 3, 9, 71, 109, 213, 311, 327, 639, 933, 981, 2799, 7739, 22081, 23217, 33899, 66243, 69651, 101697, 198729, 305091, 2406829, 7220487, 21661461]

約数ペア:

[(1, 21661461), (3, 7220487), (9, 2406829), (71, 305091), (109, 198729), (213, 101697), (311, 69651), (327, 66243), (639, 33899), (933, 23217), (981, 22081), (2799, 7739)]