18888931640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10981937}}^1$

素因数の和:10981991

約数の個数: 32

約数和(自身を含む): 43488474480

約数和(自身を除く): 24599542840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 10981937, 21963874, 43927748, 54909685, 87855496, 109819370, 219638740, 439277480, 472223291, 944446582, 1888893164, 2361116455, 3777786328, 4722232910, 9444465820, 18888931640]

約数ペア:

[(1, 18888931640), (2, 9444465820), (4, 4722232910), (5, 3777786328), (8, 2361116455), (10, 1888893164), (20, 944446582), (40, 472223291), (43, 439277480), (86, 219638740), (172, 109819370), (215, 87855496), (344, 54909685), (430, 43927748), (860, 21963874), (1720, 10981937)]