21000427990

素因数分解:

$2^1\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{2081311}}^1$

素因数の和:2082327

約数の個数: 16

約数和(自身を含む): 37838252160

約数和(自身を除く): 16837824170

約数列:

[1, 2, 5, 10, 1009, 2018, 5045, 10090, 2081311, 4162622, 10406555, 20813110, 2100042799, 4200085598, 10500213995, 21000427990]

約数ペア:

[(1, 21000427990), (2, 10500213995), (5, 4200085598), (10, 2100042799), (1009, 20813110), (2018, 10406555), (5045, 4162622), (10090, 2081311)]