20447847

素因数分解:

$3^2\times 7^2\times {\mathrm{199}}^1\times {\mathrm{233}}^1$

素因数の和:452

約数の個数: 36

約数和(自身を含む): 34678800

約数和(自身を除く): 14230953

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 199, 233, 441, 597, 699, 1393, 1631, 1791, 2097, 4179, 4893, 9751, 11417, 12537, 14679, 29253, 34251, 46367, 87759, 102753, 139101, 324569, 417303, 973707, 2271983, 2921121, 6815949, 20447847]

約数ペア:

[(1, 20447847), (3, 6815949), (7, 2921121), (9, 2271983), (21, 973707), (49, 417303), (63, 324569), (147, 139101), (199, 102753), (233, 87759), (441, 46367), (597, 34251), (699, 29253), (1393, 14679), (1631, 12537), (1791, 11417), (2097, 9751), (4179, 4893)]