20805589

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{311}}^1\times {\mathrm{503}}^1$

素因数の和:840

約数の個数: 16

約数和(自身を含む): 25159680

約数和(自身を除く): 4354091

約数列:

[1, 7, 19, 133, 311, 503, 2177, 3521, 5909, 9557, 41363, 66899, 156433, 1095031, 2972227, 20805589]

約数ペア:

[(1, 20805589), (7, 2972227), (19, 1095031), (133, 156433), (311, 66899), (503, 41363), (2177, 9557), (3521, 5909)]