19810581

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{30431}}^1$

素因数の和:30472

約数の個数: 16

約数和(自身を含む): 31162368

約数和(自身を除く): 11351787

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 30431, 91293, 213017, 639051, 943361, 2830083, 6603527, 19810581]

約数ペア:

[(1, 19810581), (3, 6603527), (7, 2830083), (21, 943361), (31, 639051), (93, 213017), (217, 91293), (651, 30431)]