21309669

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:386

約数の個数: 32

約数和(自身を含む): 32941440

約数和(自身を除く): 11631771

約数列:

[1, 3, 9, 27, 37, 83, 111, 249, 257, 333, 747, 771, 999, 2241, 2313, 3071, 6939, 9213, 9509, 21331, 27639, 28527, 63993, 82917, 85581, 191979, 256743, 575937, 789247, 2367741, 7103223, 21309669]

約数ペア:

[(1, 21309669), (3, 7103223), (9, 2367741), (27, 789247), (37, 575937), (83, 256743), (111, 191979), (249, 85581), (257, 82917), (333, 63993), (747, 28527), (771, 27639), (999, 21331), (2241, 9509), (2313, 9213), (3071, 6939)]