20938040

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1049}}^1$

素因数の和:1559

約数の個数: 32

約数和(自身を含む): 47250000

約数和(自身を除く): 26311960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1049, 1996, 2098, 2495, 3992, 4196, 4990, 5245, 8392, 9980, 10490, 19960, 20980, 41960, 523451, 1046902, 2093804, 2617255, 4187608, 5234510, 10469020, 20938040]

約数ペア:

[(1, 20938040), (2, 10469020), (4, 5234510), (5, 4187608), (8, 2617255), (10, 2093804), (20, 1046902), (40, 523451), (499, 41960), (998, 20980), (1049, 19960), (1996, 10490), (2098, 9980), (2495, 8392), (3992, 5245), (4196, 4990)]