20890115

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{181}}^1\times {\mathrm{563}}^1$

素因数の和:790

約数の個数: 16

約数和(自身を含む): 25867296

約数和(自身を除く): 4977181

約数列:

[1, 5, 41, 181, 205, 563, 905, 2815, 7421, 23083, 37105, 101903, 115415, 509515, 4178023, 20890115]

約数ペア:

[(1, 20890115), (5, 4178023), (41, 509515), (181, 115415), (205, 101903), (563, 37105), (905, 23083), (2815, 7421)]