21646989

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{26431}}^1$

素因数の和:26457

約数の個数: 24

約数和(自身を含む): 38484992

約数和(自身を除く): 16838003

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 26431, 79293, 185017, 237879, 343603, 555051, 1030809, 1665153, 2405221, 3092427, 7215663, 21646989]

約数ペア:

[(1, 21646989), (3, 7215663), (7, 3092427), (9, 2405221), (13, 1665153), (21, 1030809), (39, 555051), (63, 343603), (91, 237879), (117, 185017), (273, 79293), (819, 26431)]