3987020

素因数分解:

$2^2\times 5^1\times {\mathrm{311}}^1\times {\mathrm{641}}^1$

素因数の和:961

約数の個数: 24

約数和(自身を含む): 8412768

約数和(自身を除く): 4425748

約数列:

[1, 2, 4, 5, 10, 20, 311, 622, 641, 1244, 1282, 1555, 2564, 3110, 3205, 6220, 6410, 12820, 199351, 398702, 797404, 996755, 1993510, 3987020]

約数ペア:

[(1, 3987020), (2, 1993510), (4, 996755), (5, 797404), (10, 398702), (20, 199351), (311, 12820), (622, 6410), (641, 6220), (1244, 3205), (1282, 3110), (1555, 2564)]