19911579

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1\times {\mathrm{853}}^1$

素因数の和:1138

約数の個数: 16

約数和(自身を含む): 27546624

約数和(自身を除く): 7635045

約数列:

[1, 3, 31, 93, 251, 753, 853, 2559, 7781, 23343, 26443, 79329, 214103, 642309, 6637193, 19911579]

約数ペア:

[(1, 19911579), (3, 6637193), (31, 642309), (93, 214103), (251, 79329), (753, 26443), (853, 23343), (2559, 7781)]