256712211

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{214463}}^1$

素因数の和:214495

約数の個数: 24

約数和(自身を含む): 446085120

約数和(自身を除く): 189372909

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 214463, 643389, 1501241, 1930167, 4074797, 4503723, 12224391, 13511169, 28523579, 36673173, 85570737, 256712211]

約数ペア:

[(1, 256712211), (3, 85570737), (7, 36673173), (9, 28523579), (19, 13511169), (21, 12224391), (57, 4503723), (63, 4074797), (133, 1930167), (171, 1501241), (399, 643389), (1197, 214463)]