19945805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{2609}}^1$

素因数の和:2764

約数の個数: 16

約数和(自身を含む): 26308800

約数和(自身を除く): 6362995

約数列:

[1, 5, 11, 55, 139, 695, 1529, 2609, 7645, 13045, 28699, 143495, 362651, 1813255, 3989161, 19945805]

約数ペア:

[(1, 19945805), (5, 3989161), (11, 1813255), (55, 362651), (139, 143495), (695, 28699), (1529, 13045), (2609, 7645)]