20881817

素因数分解:

${\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{293}}^1$

素因数の和:365

約数の個数: 24

約数和(自身を含む): 25025280

約数和(自身を除く): 4143463

約数列:

[1, 11, 19, 31, 121, 209, 293, 341, 589, 2299, 3223, 3751, 5567, 6479, 9083, 35453, 61237, 71269, 99913, 172577, 673607, 1099043, 1898347, 20881817]

約数ペア:

[(1, 20881817), (11, 1898347), (19, 1099043), (31, 673607), (121, 172577), (209, 99913), (293, 71269), (341, 61237), (589, 35453), (2299, 9083), (3223, 6479), (3751, 5567)]