1981045

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{199}}^1$

素因数の和:396

約数の個数: 16

約数和(自身を含む): 2620800

約数和(自身を除く): 639755

約数列:

[1, 5, 11, 55, 181, 199, 905, 995, 1991, 2189, 9955, 10945, 36019, 180095, 396209, 1981045]

約数ペア:

[(1, 1981045), (5, 396209), (11, 180095), (55, 36019), (181, 10945), (199, 9955), (905, 2189), (995, 1991)]