18989575

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{347}}^1$

素因数の和:567

約数の個数: 24

約数和(自身を含む): 25891200

約数和(自身を除く): 6901625

約数列:

[1, 5, 11, 25, 55, 199, 275, 347, 995, 1735, 2189, 3817, 4975, 8675, 10945, 19085, 54725, 69053, 95425, 345265, 759583, 1726325, 3797915, 18989575]

約数ペア:

[(1, 18989575), (5, 3797915), (11, 1726325), (25, 759583), (55, 345265), (199, 95425), (275, 69053), (347, 54725), (995, 19085), (1735, 10945), (2189, 8675), (3817, 4975)]