20740775

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{379}}^1$

素因数の和:599

約数の個数: 24

約数和(自身を含む): 28272000

約数和(自身を除く): 7531225

約数列:

[1, 5, 11, 25, 55, 199, 275, 379, 995, 1895, 2189, 4169, 4975, 9475, 10945, 20845, 54725, 75421, 104225, 377105, 829631, 1885525, 4148155, 20740775]

約数ペア:

[(1, 20740775), (5, 4148155), (11, 1885525), (25, 829631), (55, 377105), (199, 104225), (275, 75421), (379, 54725), (995, 20845), (1895, 10945), (2189, 9475), (4169, 4975)]