25781020

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{2011}}^1$

素因数の和:2661

約数の個数: 24

約数和(自身を含む): 54251568

約数和(自身を除く): 28470548

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 2011, 2564, 3205, 4022, 6410, 8044, 10055, 12820, 20110, 40220, 1289051, 2578102, 5156204, 6445255, 12890510, 25781020]

約数ペア:

[(1, 25781020), (2, 12890510), (4, 6445255), (5, 5156204), (10, 2578102), (20, 1289051), (641, 40220), (1282, 20110), (2011, 12820), (2564, 10055), (3205, 8044), (4022, 6410)]