18909215

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1\times {\mathrm{691}}^1$

素因数の和:1130

約数の個数: 16

約数和(自身を含む): 24530016

約数和(自身を除く): 5620801

約数列:

[1, 5, 13, 65, 421, 691, 2105, 3455, 5473, 8983, 27365, 44915, 290911, 1454555, 3781843, 18909215]

約数ペア:

[(1, 18909215), (5, 3781843), (13, 1454555), (65, 290911), (421, 44915), (691, 27365), (2105, 8983), (3455, 5473)]