20415681

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{547}}^1$

素因数の和:606

約数の個数: 48

約数和(自身を含む): 35904960

約数和(自身を除く): 15489279

約数列:

[1, 3, 9, 11, 13, 29, 33, 39, 87, 99, 117, 143, 261, 319, 377, 429, 547, 957, 1131, 1287, 1641, 2871, 3393, 4147, 4923, 6017, 7111, 12441, 15863, 18051, 21333, 37323, 47589, 54153, 63999, 78221, 142767, 174493, 206219, 234663, 523479, 618657, 703989, 1570437, 1855971, 2268409, 6805227, 20415681]

約数ペア:

[(1, 20415681), (3, 6805227), (9, 2268409), (11, 1855971), (13, 1570437), (29, 703989), (33, 618657), (39, 523479), (87, 234663), (99, 206219), (117, 174493), (143, 142767), (261, 78221), (319, 63999), (377, 54153), (429, 47589), (547, 37323), (957, 21333), (1131, 18051), (1287, 15863), (1641, 12441), (2871, 7111), (3393, 6017), (4147, 4923)]