20640055

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{1097}}^1$

素因数の和:1226

約数の個数: 16

約数和(自身を含む): 25614144

約数和(自身を除く): 4974089

約数列:

[1, 5, 53, 71, 265, 355, 1097, 3763, 5485, 18815, 58141, 77887, 290705, 389435, 4128011, 20640055]

約数ペア:

[(1, 20640055), (5, 4128011), (53, 389435), (71, 290705), (265, 77887), (355, 58141), (1097, 18815), (3763, 5485)]