21878721

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{113}}^1$

素因数の和:294

約数の個数: 32

約数和(自身を含む): 33488640

約数和(自身を除く): 11609919

約数列:

[1, 3, 9, 27, 71, 101, 113, 213, 303, 339, 639, 909, 1017, 1917, 2727, 3051, 7171, 8023, 11413, 21513, 24069, 34239, 64539, 72207, 102717, 193617, 216621, 308151, 810323, 2430969, 7292907, 21878721]

約数ペア:

[(1, 21878721), (3, 7292907), (9, 2430969), (27, 810323), (71, 308151), (101, 216621), (113, 193617), (213, 102717), (303, 72207), (339, 64539), (639, 34239), (909, 24069), (1017, 21513), (1917, 11413), (2727, 8023), (3051, 7171)]