21210891

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{4813}}^1$

素因数の和:4942

約数の個数: 16

約数和(自身を含む): 30732576

約数和(自身を除く): 9521685

約数列:

[1, 3, 13, 39, 113, 339, 1469, 4407, 4813, 14439, 62569, 187707, 543869, 1631607, 7070297, 21210891]

約数ペア:

[(1, 21210891), (3, 7070297), (13, 1631607), (39, 543869), (113, 187707), (339, 62569), (1469, 14439), (4407, 4813)]