20778989

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2029}}^1$

素因数の和:2073

約数の個数: 24

約数和(自身を含む): 27770400

約数和(自身を除く): 6991411

約数列:

[1, 7, 11, 19, 49, 77, 133, 209, 539, 931, 1463, 2029, 10241, 14203, 22319, 38551, 99421, 156233, 269857, 424061, 1093631, 1888999, 2968427, 20778989]

約数ペア:

[(1, 20778989), (7, 2968427), (11, 1888999), (19, 1093631), (49, 424061), (77, 269857), (133, 156233), (209, 99421), (539, 38551), (931, 22319), (1463, 14203), (2029, 10241)]