21207804939

素因数分解:

$3^3\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{251191}}^1$

素因数の和:251312

約数の個数: 32

約数和(自身を含む): 32554483200

約数和(自身を除く): 11346678261

約数列:

[1, 3, 9, 27, 53, 59, 159, 177, 477, 531, 1431, 1593, 3127, 9381, 28143, 84429, 251191, 753573, 2260719, 6782157, 13313123, 14820269, 39939369, 44460807, 119818107, 133382421, 359454321, 400147263, 785474257, 2356422771, 7069268313, 21207804939]

約数ペア:

[(1, 21207804939), (3, 7069268313), (9, 2356422771), (27, 785474257), (53, 400147263), (59, 359454321), (159, 133382421), (177, 119818107), (477, 44460807), (531, 39939369), (1431, 14820269), (1593, 13313123), (3127, 6782157), (9381, 2260719), (28143, 753573), (84429, 251191)]