20684495

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{18719}}^1$

素因数の和:18754

約数の個数: 16

約数和(自身を含む): 28304640

約数和(自身を除く): 7620145

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 18719, 93595, 243347, 318223, 1216735, 1591115, 4136899, 20684495]

約数ペア:

[(1, 20684495), (5, 4136899), (13, 1591115), (17, 1216735), (65, 318223), (85, 243347), (221, 93595), (1105, 18719)]