18556040

素因数分解:

$2^3\times 5^1\times {\mathrm{523}}^1\times {\mathrm{887}}^1$

素因数の和:1421

約数の個数: 32

約数和(自身を含む): 41878080

約数和(自身を除く): 23322040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 523, 887, 1046, 1774, 2092, 2615, 3548, 4184, 4435, 5230, 7096, 8870, 10460, 17740, 20920, 35480, 463901, 927802, 1855604, 2319505, 3711208, 4639010, 9278020, 18556040]

約数ペア:

[(1, 18556040), (2, 9278020), (4, 4639010), (5, 3711208), (8, 2319505), (10, 1855604), (20, 927802), (40, 463901), (523, 35480), (887, 20920), (1046, 17740), (1774, 10460), (2092, 8870), (2615, 7096), (3548, 5230), (4184, 4435)]