20807105

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{2539}}^1$

素因数の和:2704

約数の個数: 16

約数和(自身を含む): 27432000

約数和(自身を除く): 6624895

約数列:

[1, 5, 11, 55, 149, 745, 1639, 2539, 8195, 12695, 27929, 139645, 378311, 1891555, 4161421, 20807105]

約数ペア:

[(1, 20807105), (5, 4161421), (11, 1891555), (55, 378311), (149, 139645), (745, 27929), (1639, 12695), (2539, 8195)]