839780

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{211}}^1$

素因数の和:419

約数の個数: 24

約数和(自身を含む): 1780800

約数和(自身を除く): 941020

約数列:

[1, 2, 4, 5, 10, 20, 199, 211, 398, 422, 796, 844, 995, 1055, 1990, 2110, 3980, 4220, 41989, 83978, 167956, 209945, 419890, 839780]

約数ペア:

[(1, 839780), (2, 419890), (4, 209945), (5, 167956), (10, 83978), (20, 41989), (199, 4220), (211, 3980), (398, 2110), (422, 1990), (796, 1055), (844, 995)]