3998080

素因数分解:

$2^7\times 5^1\times {\mathrm{6247}}^1$

素因数の和:6266

約数の個数: 32

約数和(自身を含む): 9559440

約数和(自身を除く): 5561360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 6247, 12494, 24988, 31235, 49976, 62470, 99952, 124940, 199904, 249880, 399808, 499760, 799616, 999520, 1999040, 3998080]

約数ペア:

[(1, 3998080), (2, 1999040), (4, 999520), (5, 799616), (8, 499760), (10, 399808), (16, 249880), (20, 199904), (32, 124940), (40, 99952), (64, 62470), (80, 49976), (128, 31235), (160, 24988), (320, 12494), (640, 6247)]