19889815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{3511}}^1$

素因数の和:3630

約数の個数: 16

約数和(自身を含む): 26297856

約数和(自身を除く): 6408041

約数列:

[1, 5, 11, 55, 103, 515, 1133, 3511, 5665, 17555, 38621, 193105, 361633, 1808165, 3977963, 19889815]

約数ペア:

[(1, 19889815), (5, 3977963), (11, 1808165), (55, 361633), (103, 193105), (515, 38621), (1133, 17555), (3511, 5665)]