20780138

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{2399}}^1$

素因数の和:2533

約数の個数: 16

約数和(自身を含む): 32140800

約数和(自身を除く): 11360662

約数列:

[1, 2, 61, 71, 122, 142, 2399, 4331, 4798, 8662, 146339, 170329, 292678, 340658, 10390069, 20780138]

約数ペア:

[(1, 20780138), (2, 10390069), (61, 340658), (71, 292678), (122, 170329), (142, 146339), (2399, 8662), (4331, 4798)]