21050199

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15287}}^1$

素因数の和:15316

約数の個数: 20

約数和(自身を含む): 33297264

約数和(自身を除く): 12247065

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15287, 45861, 137583, 259879, 412749, 779637, 1238247, 2338911, 7016733, 21050199]

約数ペア:

[(1, 21050199), (3, 7016733), (9, 2338911), (17, 1238247), (27, 779637), (51, 412749), (81, 259879), (153, 137583), (459, 45861), (1377, 15287)]