20109355

素因数分解:

$5^1\times 7^2\times {\mathrm{211}}^1\times {\mathrm{389}}^1$

素因数の和:619

約数の個数: 24

約数和(自身を含む): 28276560

約数和(自身を除く): 8167205

約数列:

[1, 5, 7, 35, 49, 211, 245, 389, 1055, 1477, 1945, 2723, 7385, 10339, 13615, 19061, 51695, 82079, 95305, 410395, 574553, 2872765, 4021871, 20109355]

約数ペア:

[(1, 20109355), (5, 4021871), (7, 2872765), (35, 574553), (49, 410395), (211, 95305), (245, 82079), (389, 51695), (1055, 19061), (1477, 13615), (1945, 10339), (2723, 7385)]