18991208

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{55207}}^1$

素因数の和:55256

約数の個数: 16

約数和(自身を含む): 36437280

約数和(自身を除く): 17446072

約数列:

[1, 2, 4, 8, 43, 86, 172, 344, 55207, 110414, 220828, 441656, 2373901, 4747802, 9495604, 18991208]

約数ペア:

[(1, 18991208), (2, 9495604), (4, 4747802), (8, 2373901), (43, 441656), (86, 220828), (172, 110414), (344, 55207)]