19990540

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{18859}}^1$

素因数の和:18921

約数の個数: 24

約数和(自身を含む): 42774480

約数和(自身を除く): 22783940

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 18859, 37718, 75436, 94295, 188590, 377180, 999527, 1999054, 3998108, 4997635, 9995270, 19990540]

約数ペア:

[(1, 19990540), (2, 9995270), (4, 4997635), (5, 3998108), (10, 1999054), (20, 999527), (53, 377180), (106, 188590), (212, 94295), (265, 75436), (530, 37718), (1060, 18859)]