21719306

素因数分解:

$2^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{11161}}^1$

素因数の和:11309

約数の個数: 16

約数和(自身を含む): 37504320

約数和(自身を除く): 15785014

約数列:

[1, 2, 7, 14, 139, 278, 973, 1946, 11161, 22322, 78127, 156254, 1551379, 3102758, 10859653, 21719306]

約数ペア:

[(1, 21719306), (2, 10859653), (7, 3102758), (14, 1551379), (139, 156254), (278, 78127), (973, 22322), (1946, 11161)]