20992005

素因数分解:

$3^2\times 5^1\times {\mathrm{683}}^2$

素因数の和:1377

約数の個数: 18

約数和(自身を含む): 36439494

約数和(自身を除く): 15447489

約数列:

[1, 3, 5, 9, 15, 45, 683, 2049, 3415, 6147, 10245, 30735, 466489, 1399467, 2332445, 4198401, 6997335, 20992005]

約数ペア:

[(1, 20992005), (3, 6997335), (5, 4198401), (9, 2332445), (15, 1399467), (45, 466489), (683, 30735), (2049, 10245), (3415, 6147)]