21259503

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15439}}^1$

素因数の和:15468

約数の個数: 20

約数和(自身を含む): 33628320

約数和(自身を除く): 12368817

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15439, 46317, 138951, 262463, 416853, 787389, 1250559, 2362167, 7086501, 21259503]

約数ペア:

[(1, 21259503), (3, 7086501), (9, 2362167), (17, 1250559), (27, 787389), (51, 416853), (81, 262463), (153, 138951), (459, 46317), (1377, 15439)]