21125739

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{457}}^1\times {\mathrm{811}}^1$

素因数の和:1290

約数の個数: 16

約数和(自身を含む): 29751680

約数和(自身を除く): 8625941

約数列:

[1, 3, 19, 57, 457, 811, 1371, 2433, 8683, 15409, 26049, 46227, 370627, 1111881, 7041913, 21125739]

約数ペア:

[(1, 21125739), (3, 7041913), (19, 1111881), (57, 370627), (457, 46227), (811, 26049), (1371, 15409), (2433, 8683)]