19491440

素因数分解:

$2^4\times 5^1\times {\mathrm{243643}}^1$

素因数の和:243656

約数の個数: 20

約数和(自身を含む): 45317784

約数和(自身を除く): 25826344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243643, 487286, 974572, 1218215, 1949144, 2436430, 3898288, 4872860, 9745720, 19491440]

約数ペア:

[(1, 19491440), (2, 9745720), (4, 4872860), (5, 3898288), (8, 2436430), (10, 1949144), (16, 1218215), (20, 974572), (40, 487286), (80, 243643)]