19978005

素因数分解:

$3^1\times 5^1\times {\mathrm{673}}^1\times {\mathrm{1979}}^1$

素因数の和:2660

約数の個数: 16

約数和(自身を含む): 32028480

約数和(自身を除く): 12050475

約数列:

[1, 3, 5, 15, 673, 1979, 2019, 3365, 5937, 9895, 10095, 29685, 1331867, 3995601, 6659335, 19978005]

約数ペア:

[(1, 19978005), (3, 6659335), (5, 3995601), (15, 1331867), (673, 29685), (1979, 10095), (2019, 9895), (3365, 5937)]