21742821

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{2957}}^1$

素因数の和:3025

約数の個数: 24

約数和(自身を含む): 33839520

約数和(自身を除く): 12096699

約数列:

[1, 3, 9, 19, 43, 57, 129, 171, 387, 817, 2451, 2957, 7353, 8871, 26613, 56183, 127151, 168549, 381453, 505647, 1144359, 2415869, 7247607, 21742821]

約数ペア:

[(1, 21742821), (3, 7247607), (9, 2415869), (19, 1144359), (43, 505647), (57, 381453), (129, 168549), (171, 127151), (387, 56183), (817, 26613), (2451, 8871), (2957, 7353)]