21091310

素因数分解:

$2^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{20477}}^1$

素因数の和:20587

約数の個数: 16

約数和(自身を含む): 38334816

約数和(自身を除く): 17243506

約数列:

[1, 2, 5, 10, 103, 206, 515, 1030, 20477, 40954, 102385, 204770, 2109131, 4218262, 10545655, 21091310]

約数ペア:

[(1, 21091310), (2, 10545655), (5, 4218262), (10, 2109131), (103, 204770), (206, 102385), (515, 40954), (1030, 20477)]