21920463

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15919}}^1$

素因数の和:15948

約数の個数: 20

約数和(自身を含む): 34673760

約数和(自身を除く): 12753297

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15919, 47757, 143271, 270623, 429813, 811869, 1289439, 2435607, 7306821, 21920463]

約数ペア:

[(1, 21920463), (3, 7306821), (9, 2435607), (17, 1289439), (27, 811869), (51, 429813), (81, 270623), (153, 143271), (459, 47757), (1377, 15919)]