18900980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{135007}}^1$

素因数の和:135023

約数の個数: 24

約数和(自身を含む): 45362688

約数和(自身を除く): 26461708

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 135007, 270014, 540028, 675035, 945049, 1350070, 1890098, 2700140, 3780196, 4725245, 9450490, 18900980]

約数ペア:

[(1, 18900980), (2, 9450490), (4, 4725245), (5, 3780196), (7, 2700140), (10, 1890098), (14, 1350070), (20, 945049), (28, 675035), (35, 540028), (70, 270014), (140, 135007)]