21248721

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{941}}^1$

素因数の和:1153

約数の個数: 24

約数和(自身を含む): 33260136

約数和(自身を除く): 12011415

約数列:

[1, 3, 9, 13, 39, 117, 193, 579, 941, 1737, 2509, 2823, 7527, 8469, 12233, 22581, 36699, 110097, 181613, 544839, 1634517, 2360969, 7082907, 21248721]

約数ペア:

[(1, 21248721), (3, 7082907), (9, 2360969), (13, 1634517), (39, 544839), (117, 181613), (193, 110097), (579, 36699), (941, 22581), (1737, 12233), (2509, 8469), (2823, 7527)]