18901205

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{137}}^1\times {\mathrm{673}}^1$

素因数の和:856

約数の個数: 16

約数和(自身を含む): 23439024

約数和(自身を除く): 4537819

約数列:

[1, 5, 41, 137, 205, 673, 685, 3365, 5617, 27593, 28085, 92201, 137965, 461005, 3780241, 18901205]

約数ペア:

[(1, 18901205), (5, 3780241), (41, 461005), (137, 137965), (205, 92201), (673, 28085), (685, 27593), (3365, 5617)]