20145694821

素因数分解:

$3^1\times 7^2\times {\mathrm{353}}^1\times {\mathrm{388231}}^1$

素因数の和:388601

約数の個数: 24

約数和(自身を含む): 31334981184

約数和(自身を除く): 11189286363

約数列:

[1, 3, 7, 21, 49, 147, 353, 1059, 2471, 7413, 17297, 51891, 388231, 1164693, 2717617, 8152851, 19023319, 57069957, 137045543, 411136629, 959318801, 2877956403, 6715231607, 20145694821]

約数ペア:

[(1, 20145694821), (3, 6715231607), (7, 2877956403), (21, 959318801), (49, 411136629), (147, 137045543), (353, 57069957), (1059, 19023319), (2471, 8152851), (7413, 2717617), (17297, 1164693), (51891, 388231)]