20887551

素因数分解:

$3^5\times {\mathrm{43}}^1\times {\mathrm{1999}}^1$

素因数の和:2057

約数の個数: 24

約数和(自身を含む): 32032000

約数和(自身を除く): 11144449

約数列:

[1, 3, 9, 27, 43, 81, 129, 243, 387, 1161, 1999, 3483, 5997, 10449, 17991, 53973, 85957, 161919, 257871, 485757, 773613, 2320839, 6962517, 20887551]

約数ペア:

[(1, 20887551), (3, 6962517), (9, 2320839), (27, 773613), (43, 485757), (81, 257871), (129, 161919), (243, 85957), (387, 53973), (1161, 17991), (1999, 10449), (3483, 5997)]