20690480

素因数分解:

$2^4\times 5^1\times {\mathrm{258631}}^1$

素因数の和:258644

約数の個数: 20

約数和(自身を含む): 48105552

約数和(自身を除く): 27415072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258631, 517262, 1034524, 1293155, 2069048, 2586310, 4138096, 5172620, 10345240, 20690480]

約数ペア:

[(1, 20690480), (2, 10345240), (4, 5172620), (5, 4138096), (8, 2586310), (10, 2069048), (16, 1293155), (20, 1034524), (40, 517262), (80, 258631)]