21402261

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{1907}}^1$

素因数の和:1985

約数の個数: 24

約数和(自身を含む): 32741280

約数和(自身を除く): 11339019

約数列:

[1, 3, 9, 29, 43, 87, 129, 261, 387, 1247, 1907, 3741, 5721, 11223, 17163, 55303, 82001, 165909, 246003, 497727, 738009, 2378029, 7134087, 21402261]

約数ペア:

[(1, 21402261), (3, 7134087), (9, 2378029), (29, 738009), (43, 497727), (87, 246003), (129, 165909), (261, 82001), (387, 55303), (1247, 17163), (1907, 11223), (3741, 5721)]