21000887990

素因数分解:

$2^1\times 5^1\times {\mathrm{1259}}^1\times {\mathrm{1668061}}^1$

素因数の和:1669327

約数の個数: 16

約数和(自身を含む): 37831646160

約数和(自身を除く): 16830758170

約数列:

[1, 2, 5, 10, 1259, 2518, 6295, 12590, 1668061, 3336122, 8340305, 16680610, 2100088799, 4200177598, 10500443995, 21000887990]

約数ペア:

[(1, 21000887990), (2, 10500443995), (5, 4200177598), (10, 2100088799), (1259, 16680610), (2518, 8340305), (6295, 3336122), (12590, 1668061)]