20199421780

素因数分解:

$2^2\times 5^1\times {\mathrm{1009971089}}^1$

素因数の和:1009971098

約数の個数: 12

約数和(自身を含む): 42418785780

約数和(自身を除く): 22219364000

約数列:

[1, 2, 4, 5, 10, 20, 1009971089, 2019942178, 4039884356, 5049855445, 10099710890, 20199421780]

約数ペア:

[(1, 20199421780), (2, 10099710890), (4, 5049855445), (5, 4039884356), (10, 2019942178), (20, 1009971089)]