20780661

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 33707520

約数和(自身を除く): 12926859

約数列:

[1, 3, 11, 19, 23, 33, 57, 69, 121, 131, 209, 253, 363, 393, 437, 627, 759, 1311, 1441, 2299, 2489, 2783, 3013, 4323, 4807, 6897, 7467, 8349, 9039, 14421, 15851, 27379, 33143, 47553, 52877, 57247, 82137, 99429, 158631, 171741, 301169, 364573, 629717, 903507, 1093719, 1889151, 6926887, 20780661]

約数ペア:

[(1, 20780661), (3, 6926887), (11, 1889151), (19, 1093719), (23, 903507), (33, 629717), (57, 364573), (69, 301169), (121, 171741), (131, 158631), (209, 99429), (253, 82137), (363, 57247), (393, 52877), (437, 47553), (627, 33143), (759, 27379), (1311, 15851), (1441, 14421), (2299, 9039), (2489, 8349), (2783, 7467), (3013, 6897), (4323, 4807)]