18531440

素因数分解:

$2^4\times 5^1\times {\mathrm{231643}}^1$

素因数の和:231656

約数の個数: 20

約数和(自身を含む): 43085784

約数和(自身を除く): 24554344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 231643, 463286, 926572, 1158215, 1853144, 2316430, 3706288, 4632860, 9265720, 18531440]

約数ペア:

[(1, 18531440), (2, 9265720), (4, 4632860), (5, 3706288), (8, 2316430), (10, 1853144), (16, 1158215), (20, 926572), (40, 463286), (80, 231643)]