21900249

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{11987}}^1$

素因数の和:12029

約数の個数: 24

約数和(自身を含む): 37402560

約数和(自身を除く): 15502311

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827, 11987, 35961, 83909, 107883, 251727, 347623, 755181, 1042869, 2433361, 3128607, 7300083, 21900249]

約数ペア:

[(1, 21900249), (3, 7300083), (7, 3128607), (9, 2433361), (21, 1042869), (29, 755181), (63, 347623), (87, 251727), (203, 107883), (261, 83909), (609, 35961), (1827, 11987)]