18904015

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{337}}^1\times {\mathrm{863}}^1$

素因数の和:1218

約数の個数: 16

約数和(自身を含む): 24530688

約数和(自身を除く): 5626673

約数列:

[1, 5, 13, 65, 337, 863, 1685, 4315, 4381, 11219, 21905, 56095, 290831, 1454155, 3780803, 18904015]

約数ペア:

[(1, 18904015), (5, 3780803), (13, 1454155), (65, 290831), (337, 56095), (863, 21905), (1685, 11219), (4315, 4381)]