20991617

素因数分解:

${\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{1451}}^1$

素因数の和:1528

約数の個数: 16

約数和(自身を含む): 23836032

約数和(自身を除く): 2844415

約数列:

[1, 17, 23, 37, 391, 629, 851, 1451, 14467, 24667, 33373, 53687, 567341, 912679, 1234801, 20991617]

約数ペア:

[(1, 20991617), (17, 1234801), (23, 912679), (37, 567341), (391, 53687), (629, 33373), (851, 24667), (1451, 14467)]