21068151

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{739}}^1$

素因数の和:815

約数の個数: 32

約数和(自身を含む): 32820480

約数和(自身を除く): 11752329

約数列:

[1, 3, 13, 17, 39, 43, 51, 129, 221, 559, 663, 731, 739, 1677, 2193, 2217, 9503, 9607, 12563, 28509, 28821, 31777, 37689, 95331, 163319, 413101, 489957, 540209, 1239303, 1620627, 7022717, 21068151]

約数ペア:

[(1, 21068151), (3, 7022717), (13, 1620627), (17, 1239303), (39, 540209), (43, 489957), (51, 413101), (129, 163319), (221, 95331), (559, 37689), (663, 31777), (731, 28821), (739, 28509), (1677, 12563), (2193, 9607), (2217, 9503)]