20990685

素因数分解:

$3^1\times 5^1\times {\mathrm{653}}^1\times {\mathrm{2143}}^1$

素因数の和:2804

約数の個数: 16

約数和(自身を含む): 33652224

約数和(自身を除く): 12661539

約数列:

[1, 3, 5, 15, 653, 1959, 2143, 3265, 6429, 9795, 10715, 32145, 1399379, 4198137, 6996895, 20990685]

約数ペア:

[(1, 20990685), (3, 6996895), (5, 4198137), (15, 1399379), (653, 32145), (1959, 10715), (2143, 9795), (3265, 6429)]