19820457

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{10639}}^1$

素因数の和:10674

約数の個数: 20

約数和(自身を含む): 30898560

約数和(自身を除く): 11078103

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 621, 1863, 10639, 31917, 95751, 244697, 287253, 734091, 861759, 2202273, 6606819, 19820457]

約数ペア:

[(1, 19820457), (3, 6606819), (9, 2202273), (23, 861759), (27, 734091), (69, 287253), (81, 244697), (207, 95751), (621, 31917), (1863, 10639)]