20512505390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157788503}}^1$

素因数の和:157788523

約数の個数: 16

約数和(自身を含む): 39762703008

約数和(自身を除く): 19250197618

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 157788503, 315577006, 788942515, 1577885030, 2051250539, 4102501078, 10256252695, 20512505390]

約数ペア:

[(1, 20512505390), (2, 10256252695), (5, 4102501078), (10, 2051250539), (13, 1577885030), (26, 788942515), (65, 315577006), (130, 157788503)]