21200181

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 31549440

約数和(自身を除く): 10349259

約数列:

[1, 3, 19, 23, 57, 69, 103, 157, 309, 437, 471, 1311, 1957, 2369, 2983, 3611, 5871, 7107, 8949, 10833, 16171, 45011, 48513, 68609, 135033, 205827, 307249, 371933, 921747, 1115799, 7066727, 21200181]

約数ペア:

[(1, 21200181), (3, 7066727), (19, 1115799), (23, 921747), (57, 371933), (69, 307249), (103, 205827), (157, 135033), (309, 68609), (437, 48513), (471, 45011), (1311, 16171), (1957, 10833), (2369, 8949), (2983, 7107), (3611, 5871)]