17878887

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{16979}}^1$

素因数の和:17004

約数の個数: 20

約数和(自身を含む): 28764120

約数和(自身を除く): 10885233

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 16979, 50937, 152811, 220727, 458433, 662181, 1375299, 1986543, 5959629, 17878887]

約数ペア:

[(1, 17878887), (3, 5959629), (9, 1986543), (13, 1375299), (27, 662181), (39, 458433), (81, 220727), (117, 152811), (351, 50937), (1053, 16979)]