21578751

素因数分解:

$3^3\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{193}}^1$

素因数の和:344

約数の個数: 32

約数和(自身を含む): 33243840

約数和(自身を除く): 11665089

約数列:

[1, 3, 9, 27, 41, 101, 123, 193, 303, 369, 579, 909, 1107, 1737, 2727, 4141, 5211, 7913, 12423, 19493, 23739, 37269, 58479, 71217, 111807, 175437, 213651, 526311, 799213, 2397639, 7192917, 21578751]

約数ペア:

[(1, 21578751), (3, 7192917), (9, 2397639), (27, 799213), (41, 526311), (101, 213651), (123, 175437), (193, 111807), (303, 71217), (369, 58479), (579, 37269), (909, 23739), (1107, 19493), (1737, 12423), (2727, 7913), (4141, 5211)]