20999457

素因数分解:

$3^2\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{557}}^1$

素因数の和:693

約数の個数: 24

約数和(自身を含む): 31337280

約数和(自身を除く): 10337823

約数列:

[1, 3, 9, 59, 71, 177, 213, 531, 557, 639, 1671, 4189, 5013, 12567, 32863, 37701, 39547, 98589, 118641, 295767, 355923, 2333273, 6999819, 20999457]

約数ペア:

[(1, 20999457), (3, 6999819), (9, 2333273), (59, 355923), (71, 295767), (177, 118641), (213, 98589), (531, 39547), (557, 37701), (639, 32863), (1671, 12567), (4189, 5013)]