28621820

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{3499}}^1$

素因数の和:3917

約数の個数: 24

約数和(自身を含む): 60270000

約数和(自身を除く): 31648180

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 3499, 4090, 6998, 8180, 13996, 17495, 34990, 69980, 1431091, 2862182, 5724364, 7155455, 14310910, 28621820]

約数ペア:

[(1, 28621820), (2, 14310910), (4, 7155455), (5, 5724364), (10, 2862182), (20, 1431091), (409, 69980), (818, 34990), (1636, 17495), (2045, 13996), (3499, 8180), (4090, 6998)]