20128257

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{5779}}^1$

素因数の和:5834

約数の個数: 20

約数和(自身を含む): 30772720

約数和(自身を除く): 10644463

約数列:

[1, 3, 9, 27, 43, 81, 129, 387, 1161, 3483, 5779, 17337, 52011, 156033, 248497, 468099, 745491, 2236473, 6709419, 20128257]

約数ペア:

[(1, 20128257), (3, 6709419), (9, 2236473), (27, 745491), (43, 468099), (81, 248497), (129, 156033), (387, 52011), (1161, 17337), (3483, 5779)]