21168621

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15373}}^1$

素因数の和:15402

約数の個数: 20

約数和(自身を含む): 33484572

約数和(自身を除く): 12315951

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15373, 46119, 138357, 261341, 415071, 784023, 1245213, 2352069, 7056207, 21168621]

約数ペア:

[(1, 21168621), (3, 7056207), (9, 2352069), (17, 1245213), (27, 784023), (51, 415071), (81, 261341), (153, 138357), (459, 46119), (1377, 15373)]