21198387

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43889}}^1$

素因数の和:43922

約数の個数: 16

約数和(自身を含む): 33707520

約数和(自身を除く): 12509133

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 43889, 131667, 307223, 921669, 1009447, 3028341, 7066129, 21198387]

約数ペア:

[(1, 21198387), (3, 7066129), (7, 3028341), (21, 1009447), (23, 921669), (69, 307223), (161, 131667), (483, 43889)]