20105080

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11689}}^1$

素因数の和:11743

約数の個数: 32

約数和(自身を含む): 46292400

約数和(自身を除く): 26187320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11689, 23378, 46756, 58445, 93512, 116890, 233780, 467560, 502627, 1005254, 2010508, 2513135, 4021016, 5026270, 10052540, 20105080]

約数ペア:

[(1, 20105080), (2, 10052540), (4, 5026270), (5, 4021016), (8, 2513135), (10, 2010508), (20, 1005254), (40, 502627), (43, 467560), (86, 233780), (172, 116890), (215, 93512), (344, 58445), (430, 46756), (860, 23378), (1720, 11689)]