78999280

素因数分解:

$2^4\times 5^1\times {\mathrm{987491}}^1$

素因数の和:987504

約数の個数: 20

約数和(自身を含む): 183673512

約数和(自身を除く): 104674232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 987491, 1974982, 3949964, 4937455, 7899928, 9874910, 15799856, 19749820, 39499640, 78999280]

約数ペア:

[(1, 78999280), (2, 39499640), (4, 19749820), (5, 15799856), (8, 9874910), (10, 7899928), (16, 4937455), (20, 3949964), (40, 1974982), (80, 987491)]