19985785

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{337}}^1\times {\mathrm{409}}^1$

素因数の和:780

約数の個数: 16

約数和(自身を含む): 24944400

約数和(自身を除く): 4958615

約数列:

[1, 5, 29, 145, 337, 409, 1685, 2045, 9773, 11861, 48865, 59305, 137833, 689165, 3997157, 19985785]

約数ペア:

[(1, 19985785), (5, 3997157), (29, 689165), (145, 137833), (337, 59305), (409, 48865), (1685, 11861), (2045, 9773)]