20457905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{10853}}^1$

素因数の和:10900

約数の個数: 16

約数和(自身を含む): 27352080

約数和(自身を除く): 6894175

約数列:

[1, 5, 13, 29, 65, 145, 377, 1885, 10853, 54265, 141089, 314737, 705445, 1573685, 4091581, 20457905]

約数ペア:

[(1, 20457905), (5, 4091581), (13, 1573685), (29, 705445), (65, 314737), (145, 141089), (377, 54265), (1885, 10853)]