3999280

素因数分解:

$2^4\times 5^1\times {\mathrm{49991}}^1$

素因数の和:50004

約数の個数: 20

約数和(自身を含む): 9298512

約数和(自身を除く): 5299232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 49991, 99982, 199964, 249955, 399928, 499910, 799856, 999820, 1999640, 3999280]

約数ペア:

[(1, 3999280), (2, 1999640), (4, 999820), (5, 799856), (8, 499910), (10, 399928), (16, 249955), (20, 199964), (40, 99982), (80, 49991)]