21038157

素因数分解:

$3^3\times 7^1\times {\mathrm{157}}^1\times {\mathrm{709}}^1$

素因数の和:882

約数の個数: 32

約数和(自身を含む): 35897600

約数和(自身を除く): 14859443

約数列:

[1, 3, 7, 9, 21, 27, 63, 157, 189, 471, 709, 1099, 1413, 2127, 3297, 4239, 4963, 6381, 9891, 14889, 19143, 29673, 44667, 111313, 134001, 333939, 779191, 1001817, 2337573, 3005451, 7012719, 21038157]

約数ペア:

[(1, 21038157), (3, 7012719), (7, 3005451), (9, 2337573), (21, 1001817), (27, 779191), (63, 333939), (157, 134001), (189, 111313), (471, 44667), (709, 29673), (1099, 19143), (1413, 14889), (2127, 9891), (3297, 6381), (4239, 4963)]