19800605

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{521}}^1\times {\mathrm{691}}^1$

素因数の和:1228

約数の個数: 16

約数和(自身を含む): 26008128

約数和(自身を除く): 6207523

約数列:

[1, 5, 11, 55, 521, 691, 2605, 3455, 5731, 7601, 28655, 38005, 360011, 1800055, 3960121, 19800605]

約数ペア:

[(1, 19800605), (5, 3960121), (11, 1800055), (55, 360011), (521, 38005), (691, 28655), (2605, 7601), (3455, 5731)]