18858220

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1471}}^1$

素因数の和:2121

約数の個数: 24

約数和(自身を含む): 39691008

約数和(自身を除く): 20832788

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 1471, 2564, 2942, 3205, 5884, 6410, 7355, 12820, 14710, 29420, 942911, 1885822, 3771644, 4714555, 9429110, 18858220]

約数ペア:

[(1, 18858220), (2, 9429110), (4, 4714555), (5, 3771644), (10, 1885822), (20, 942911), (641, 29420), (1282, 14710), (1471, 12820), (2564, 7355), (2942, 6410), (3205, 5884)]