217911681

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{620831}}^1$

素因数の和:620853

約数の個数: 16

約数和(自身を含む): 347665920

約数和(自身を除く): 129754239

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 620831, 1862493, 5587479, 8070803, 16762437, 24212409, 72637227, 217911681]

約数ペア:

[(1, 217911681), (3, 72637227), (9, 24212409), (13, 16762437), (27, 8070803), (39, 5587479), (117, 1862493), (351, 620831)]