21280149

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{19541}}^1$

素因数の和:19569

約数の個数: 18

約数和(自身を含む): 33788118

約数和(自身を除く): 12507969

約数列:

[1, 3, 9, 11, 33, 99, 121, 363, 1089, 19541, 58623, 175869, 214951, 644853, 1934559, 2364461, 7093383, 21280149]

約数ペア:

[(1, 21280149), (3, 7093383), (9, 2364461), (11, 1934559), (33, 644853), (99, 214951), (121, 175869), (363, 58623), (1089, 19541)]