20818985

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{2411}}^1$

素因数の和:2584

約数の個数: 16

約数和(自身を含む): 27438912

約数和(自身を除く): 6619927

約数列:

[1, 5, 11, 55, 157, 785, 1727, 2411, 8635, 12055, 26521, 132605, 378527, 1892635, 4163797, 20818985]

約数ペア:

[(1, 20818985), (5, 4163797), (11, 1892635), (55, 378527), (157, 132605), (785, 26521), (1727, 12055), (2411, 8635)]