19780585

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{1987}}^1$

素因数の和:2184

約数の個数: 16

約数和(自身を含む): 26050752

約数和(自身を除く): 6270167

約数列:

[1, 5, 11, 55, 181, 905, 1987, 1991, 9935, 9955, 21857, 109285, 359647, 1798235, 3956117, 19780585]

約数ペア:

[(1, 19780585), (5, 3956117), (11, 1798235), (55, 359647), (181, 109285), (905, 21857), (1987, 9955), (1991, 9935)]