21087243

素因数分解:

$3^3\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{443}}^1$

素因数の和:536

約数の個数: 32

約数和(自身を含む): 32820480

約数和(自身を除く): 11733237

約数列:

[1, 3, 9, 27, 41, 43, 123, 129, 369, 387, 443, 1107, 1161, 1329, 1763, 3987, 5289, 11961, 15867, 18163, 19049, 47601, 54489, 57147, 163467, 171441, 490401, 514323, 781009, 2343027, 7029081, 21087243]

約数ペア:

[(1, 21087243), (3, 7029081), (9, 2343027), (27, 781009), (41, 514323), (43, 490401), (123, 171441), (129, 163467), (369, 57147), (387, 54489), (443, 47601), (1107, 19049), (1161, 18163), (1329, 15867), (1763, 11961), (3987, 5289)]