20781604

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{1999}}^1$

素因数の和:2139

約数の個数: 24

約数和(自身を含む): 38304000

約数和(自身を除く): 17522396

約数列:

[1, 2, 4, 23, 46, 92, 113, 226, 452, 1999, 2599, 3998, 5198, 7996, 10396, 45977, 91954, 183908, 225887, 451774, 903548, 5195401, 10390802, 20781604]

約数ペア:

[(1, 20781604), (2, 10390802), (4, 5195401), (23, 903548), (46, 451774), (92, 225887), (113, 183908), (226, 91954), (452, 45977), (1999, 10396), (2599, 7996), (3998, 5198)]