19978961

素因数分解:

${\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1\times {\mathrm{181}}^1$

素因数の和:392

約数の個数: 16

約数和(自身を含む): 21909888

約数和(自身を除く): 1930927

約数列:

[1, 17, 43, 151, 181, 731, 2567, 3077, 6493, 7783, 27331, 110381, 132311, 464627, 1175233, 19978961]

約数ペア:

[(1, 19978961), (17, 1175233), (43, 464627), (151, 132311), (181, 110381), (731, 27331), (2567, 7783), (3077, 6493)]