21000798740

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{8268031}}^1$

素因数の和:8268167

約数の個数: 24

約数和(自身を含む): 44448940032

約数和(自身を除く): 23448141292

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 8268031, 16536062, 33072124, 41340155, 82680310, 165360620, 1050039937, 2100079874, 4200159748, 5250199685, 10500399370, 21000798740]

約数ペア:

[(1, 21000798740), (2, 10500399370), (4, 5250199685), (5, 4200159748), (10, 2100079874), (20, 1050039937), (127, 165360620), (254, 82680310), (508, 41340155), (635, 33072124), (1270, 16536062), (2540, 8268031)]