19857879

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4019}}^1$

素因数の和:4092

約数の個数: 20

約数和(自身を含む): 30158040

約数和(自身を除く): 10300161

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4019, 4941, 12057, 36171, 108513, 245159, 325539, 735477, 2206431, 6619293, 19857879]

約数ペア:

[(1, 19857879), (3, 6619293), (9, 2206431), (27, 735477), (61, 325539), (81, 245159), (183, 108513), (549, 36171), (1647, 12057), (4019, 4941)]