21519837

素因数分解:

$3^5\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 34944000

約数和(自身を除く): 13424163

約数列:

[1, 3, 9, 19, 27, 57, 59, 79, 81, 171, 177, 237, 243, 513, 531, 711, 1121, 1501, 1539, 1593, 2133, 3363, 4503, 4617, 4661, 4779, 6399, 10089, 13509, 13983, 14337, 19197, 30267, 40527, 41949, 88559, 90801, 121581, 125847, 265677, 272403, 364743, 377541, 797031, 1132623, 2391093, 7173279, 21519837]

約数ペア:

[(1, 21519837), (3, 7173279), (9, 2391093), (19, 1132623), (27, 797031), (57, 377541), (59, 364743), (79, 272403), (81, 265677), (171, 125847), (177, 121581), (237, 90801), (243, 88559), (513, 41949), (531, 40527), (711, 30267), (1121, 19197), (1501, 14337), (1539, 13983), (1593, 13509), (2133, 10089), (3363, 6399), (4503, 4779), (4617, 4661)]