20719503

素因数分解:

$3^3\times 7^2\times {\mathrm{15661}}^1$

素因数の和:15684

約数の個数: 24

約数和(自身を含む): 35709360

約数和(自身を除く): 14989857

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 15661, 46983, 109627, 140949, 328881, 422847, 767389, 986643, 2302167, 2959929, 6906501, 20719503]

約数ペア:

[(1, 20719503), (3, 6906501), (7, 2959929), (9, 2302167), (21, 986643), (27, 767389), (49, 422847), (63, 328881), (147, 140949), (189, 109627), (441, 46983), (1323, 15661)]