21399309

素因数分解:

$3^5\times {\mathrm{83}}^1\times {\mathrm{1061}}^1$

素因数の和:1159

約数の個数: 24

約数和(自身を含む): 32471712

約数和(自身を除く): 11072403

約数列:

[1, 3, 9, 27, 81, 83, 243, 249, 747, 1061, 2241, 3183, 6723, 9549, 20169, 28647, 85941, 88063, 257823, 264189, 792567, 2377701, 7133103, 21399309]

約数ペア:

[(1, 21399309), (3, 7133103), (9, 2377701), (27, 792567), (81, 264189), (83, 257823), (243, 88063), (249, 85941), (747, 28647), (1061, 20169), (2241, 9549), (3183, 6723)]