21236787

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{569}}^1$

素因数の和:628

約数の個数: 48

約数和(自身を含む): 37346400

約数和(自身を除く): 16109613

約数列:

[1, 3, 9, 11, 13, 29, 33, 39, 87, 99, 117, 143, 261, 319, 377, 429, 569, 957, 1131, 1287, 1707, 2871, 3393, 4147, 5121, 6259, 7397, 12441, 16501, 18777, 22191, 37323, 49503, 56331, 66573, 81367, 148509, 181511, 214513, 244101, 544533, 643539, 732303, 1633599, 1930617, 2359643, 7078929, 21236787]

約数ペア:

[(1, 21236787), (3, 7078929), (9, 2359643), (11, 1930617), (13, 1633599), (29, 732303), (33, 643539), (39, 544533), (87, 244101), (99, 214513), (117, 181511), (143, 148509), (261, 81367), (319, 66573), (377, 56331), (429, 49503), (569, 37323), (957, 22191), (1131, 18777), (1287, 16501), (1707, 12441), (2871, 7397), (3393, 6259), (4147, 5121)]