18904389

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:521

約数の個数: 32

約数和(自身を含む): 30228480

約数和(自身を除く): 11324091

約数列:

[1, 3, 7, 21, 31, 71, 93, 213, 217, 409, 497, 651, 1227, 1491, 2201, 2863, 6603, 8589, 12679, 15407, 29039, 38037, 46221, 87117, 88753, 203273, 266259, 609819, 900209, 2700627, 6301463, 18904389]

約数ペア:

[(1, 18904389), (3, 6301463), (7, 2700627), (21, 900209), (31, 609819), (71, 266259), (93, 203273), (213, 88753), (217, 87117), (409, 46221), (497, 38037), (651, 29039), (1227, 15407), (1491, 12679), (2201, 8589), (2863, 6603)]