1627820

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{409}}^1$

素因数の和:617

約数の個数: 24

約数和(自身を含む): 3444000

約数和(自身を除く): 1816180

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 409, 796, 818, 995, 1636, 1990, 2045, 3980, 4090, 8180, 81391, 162782, 325564, 406955, 813910, 1627820]

約数ペア:

[(1, 1627820), (2, 813910), (4, 406955), (5, 325564), (10, 162782), (20, 81391), (199, 8180), (398, 4090), (409, 3980), (796, 2045), (818, 1990), (995, 1636)]