20728029

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^2\times {\mathrm{103}}^1$

素因数の和:194

約数の個数: 36

約数和(自身を含む): 33362784

約数和(自身を除く): 12634755

約数列:

[1, 3, 7, 21, 37, 49, 103, 111, 147, 259, 309, 721, 777, 1369, 1813, 2163, 3811, 4107, 5047, 5439, 9583, 11433, 15141, 26677, 28749, 67081, 80031, 141007, 186739, 201243, 423021, 560217, 987049, 2961147, 6909343, 20728029]

約数ペア:

[(1, 20728029), (3, 6909343), (7, 2961147), (21, 987049), (37, 560217), (49, 423021), (103, 201243), (111, 186739), (147, 141007), (259, 80031), (309, 67081), (721, 28749), (777, 26677), (1369, 15141), (1813, 11433), (2163, 9583), (3811, 5439), (4107, 5047)]