21146481

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{239}}^1$

素因数の和:390

約数の個数: 32

約数和(自身を含む): 32832000

約数和(自身を除く): 11685519

約数列:

[1, 3, 9, 27, 29, 87, 113, 239, 261, 339, 717, 783, 1017, 2151, 3051, 3277, 6453, 6931, 9831, 20793, 27007, 29493, 62379, 81021, 88479, 187137, 243063, 729189, 783203, 2349609, 7048827, 21146481]

約数ペア:

[(1, 21146481), (3, 7048827), (9, 2349609), (27, 783203), (29, 729189), (87, 243063), (113, 187137), (239, 88479), (261, 81021), (339, 62379), (717, 29493), (783, 27007), (1017, 20793), (2151, 9831), (3051, 6931), (3277, 6453)]