21005019

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{11497}}^1$

素因数の和:11539

約数の個数: 24

約数和(自身を含む): 35873760

約数和(自身を除く): 14868741

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827, 11497, 34491, 80479, 103473, 241437, 333413, 724311, 1000239, 2333891, 3000717, 7001673, 21005019]

約数ペア:

[(1, 21005019), (3, 7001673), (7, 3000717), (9, 2333891), (21, 1000239), (29, 724311), (63, 333413), (87, 241437), (203, 103473), (261, 80479), (609, 34491), (1827, 11497)]