18781917

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{81307}}^1$

素因数の和:81328

約数の個数: 16

約数和(自身を含む): 31222272

約数和(自身を除く): 12440355

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 81307, 243921, 569149, 894377, 1707447, 2683131, 6260639, 18781917]

約数ペア:

[(1, 18781917), (3, 6260639), (7, 2683131), (11, 1707447), (21, 894377), (33, 569149), (77, 243921), (231, 81307)]