21356377

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1\times {\mathrm{467}}^1$

素因数の和:660

約数の個数: 16

約数和(自身を含む): 25159680

約数和(自身を除く): 3803303

約数列:

[1, 7, 47, 139, 329, 467, 973, 3269, 6533, 21949, 45731, 64913, 153643, 454391, 3050911, 21356377]

約数ペア:

[(1, 21356377), (7, 3050911), (47, 454391), (139, 153643), (329, 64913), (467, 45731), (973, 21949), (3269, 6533)]