18731817

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{17789}}^1$

素因数の和:17814

約数の個数: 20

約数和(自身を含む): 30136260

約数和(自身を除く): 11404443

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 17789, 53367, 160101, 231257, 480303, 693771, 1440909, 2081313, 6243939, 18731817]

約数ペア:

[(1, 18731817), (3, 6243939), (9, 2081313), (13, 1440909), (27, 693771), (39, 480303), (81, 231257), (117, 160101), (351, 53367), (1053, 17789)]