128559280

素因数分解:

$2^4\times 5^1\times {\mathrm{1606991}}^1$

素因数の和:1607004

約数の個数: 20

約数和(自身を含む): 298900512

約数和(自身を除く): 170341232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1606991, 3213982, 6427964, 8034955, 12855928, 16069910, 25711856, 32139820, 64279640, 128559280]

約数ペア:

[(1, 128559280), (2, 64279640), (4, 32139820), (5, 25711856), (8, 16069910), (10, 12855928), (16, 8034955), (20, 6427964), (40, 3213982), (80, 1606991)]