19151721

素因数分解:

$3^4\times {\mathrm{101}}^1\times {\mathrm{2341}}^1$

素因数の和:2454

約数の個数: 20

約数和(自身を含む): 28904964

約数和(自身を除く): 9753243

約数列:

[1, 3, 9, 27, 81, 101, 303, 909, 2341, 2727, 7023, 8181, 21069, 63207, 189621, 236441, 709323, 2127969, 6383907, 19151721]

約数ペア:

[(1, 19151721), (3, 6383907), (9, 2127969), (27, 709323), (81, 236441), (101, 189621), (303, 63207), (909, 21069), (2341, 8181), (2727, 7023)]