20971917

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{1153}}^1$

素因数の和:1249

約数の個数: 24

約数和(自身を含む): 31684224

約数和(自身を除く): 10712307

約数列:

[1, 3, 9, 43, 47, 129, 141, 387, 423, 1153, 2021, 3459, 6063, 10377, 18189, 49579, 54191, 148737, 162573, 446211, 487719, 2330213, 6990639, 20971917]

約数ペア:

[(1, 20971917), (3, 6990639), (9, 2330213), (43, 487719), (47, 446211), (129, 162573), (141, 148737), (387, 54191), (423, 49579), (1153, 18189), (2021, 10377), (3459, 6063)]