21192777

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{727}}^1$

素因数の和:853

約数の個数: 24

約数和(自身を含む): 31799040

約数和(自身を除く): 10606263

約数列:

[1, 3, 9, 41, 79, 123, 237, 369, 711, 727, 2181, 3239, 6543, 9717, 29151, 29807, 57433, 89421, 172299, 268263, 516897, 2354753, 7064259, 21192777]

約数ペア:

[(1, 21192777), (3, 7064259), (9, 2354753), (41, 516897), (79, 268263), (123, 172299), (237, 89421), (369, 57433), (711, 29807), (727, 29151), (2181, 9717), (3239, 6543)]