20659490

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^2\times {\mathrm{1229}}^1$

素因数の和:1318

約数の個数: 24

約数和(自身を含む): 38147220

約数和(自身を除く): 17487730

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 1229, 1681, 2458, 3362, 6145, 8405, 12290, 16810, 50389, 100778, 251945, 503890, 2065949, 4131898, 10329745, 20659490]

約数ペア:

[(1, 20659490), (2, 10329745), (5, 4131898), (10, 2065949), (41, 503890), (82, 251945), (205, 100778), (410, 50389), (1229, 16810), (1681, 12290), (2458, 8405), (3362, 6145)]