21021651

素因数分解:

$3^2\times 7^1\times {\mathrm{191}}^1\times {\mathrm{1747}}^1$

素因数の和:1951

約数の個数: 24

約数和(自身を含む): 34904064

約数和(自身を除く): 13882413

約数列:

[1, 3, 7, 9, 21, 63, 191, 573, 1337, 1719, 1747, 4011, 5241, 12033, 12229, 15723, 36687, 110061, 333677, 1001031, 2335739, 3003093, 7007217, 21021651]

約数ペア:

[(1, 21021651), (3, 7007217), (7, 3003093), (9, 2335739), (21, 1001031), (63, 333677), (191, 110061), (573, 36687), (1337, 15723), (1719, 12229), (1747, 12033), (4011, 5241)]