9999280

素因数分解:

$2^4\times 5^1\times {\mathrm{124991}}^1$

素因数の和:125004

約数の個数: 20

約数和(自身を含む): 23248512

約数和(自身を除く): 13249232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 124991, 249982, 499964, 624955, 999928, 1249910, 1999856, 2499820, 4999640, 9999280]

約数ペア:

[(1, 9999280), (2, 4999640), (4, 2499820), (5, 1999856), (8, 1249910), (10, 999928), (16, 624955), (20, 499964), (40, 249982), (80, 124991)]