2189995

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:306

約数の個数: 16

約数和(自身を含む): 2764800

約数和(自身を除く): 574805

約数列:

[1, 5, 31, 71, 155, 199, 355, 995, 2201, 6169, 11005, 14129, 30845, 70645, 437999, 2189995]

約数ペア:

[(1, 2189995), (5, 437999), (31, 70645), (71, 30845), (155, 14129), (199, 11005), (355, 6169), (995, 2201)]