18981680

素因数分解:

$2^4\times 5^1\times {\mathrm{237271}}^1$

素因数の和:237284

約数の個数: 20

約数和(自身を含む): 44132592

約数和(自身を除く): 25150912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 237271, 474542, 949084, 1186355, 1898168, 2372710, 3796336, 4745420, 9490840, 18981680]

約数ペア:

[(1, 18981680), (2, 9490840), (4, 4745420), (5, 3796336), (8, 2372710), (10, 1898168), (16, 1186355), (20, 949084), (40, 474542), (80, 237271)]