21879153

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15889}}^1$

素因数の和:15918

約数の個数: 20

約数和(自身を含む): 34608420

約数和(自身を除く): 12729267

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15889, 47667, 143001, 270113, 429003, 810339, 1287009, 2431017, 7293051, 21879153]

約数ペア:

[(1, 21879153), (3, 7293051), (9, 2431017), (17, 1287009), (27, 810339), (51, 429003), (81, 270113), (153, 143001), (459, 47667), (1377, 15889)]