21647213

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{3463}}^1$

素因数の和:3536

約数の個数: 16

約数和(自身を含む): 26603520

約数和(自身を除く): 4956307

約数列:

[1, 7, 19, 47, 133, 329, 893, 3463, 6251, 24241, 65797, 162761, 460579, 1139327, 3092459, 21647213]

約数ペア:

[(1, 21647213), (7, 3092459), (19, 1139327), (47, 460579), (133, 162761), (329, 65797), (893, 24241), (3463, 6251)]