21019780

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{36241}}^1$

素因数の和:36279

約数の個数: 24

約数和(自身を含む): 45664920

約数和(自身を除く): 24645140

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 36241, 72482, 144964, 181205, 362410, 724820, 1050989, 2101978, 4203956, 5254945, 10509890, 21019780]

約数ペア:

[(1, 21019780), (2, 10509890), (4, 5254945), (5, 4203956), (10, 2101978), (20, 1050989), (29, 724820), (58, 362410), (116, 181205), (145, 144964), (290, 72482), (580, 36241)]