21558901

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{337}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 28770560

約数和(自身を除く): 7211659

約数列:

[1, 7, 13, 19, 37, 91, 133, 247, 259, 337, 481, 703, 1729, 2359, 3367, 4381, 4921, 6403, 9139, 12469, 30667, 44821, 63973, 83239, 87283, 162097, 236911, 582673, 1134679, 1658377, 3079843, 21558901]

約数ペア:

[(1, 21558901), (7, 3079843), (13, 1658377), (19, 1134679), (37, 582673), (91, 236911), (133, 162097), (247, 87283), (259, 83239), (337, 63973), (481, 44821), (703, 30667), (1729, 12469), (2359, 9139), (3367, 6403), (4381, 4921)]