128800900

素因数分解:

$2^2\times 5^2\times {\mathrm{1288009}}^1$

素因数の和:1288023

約数の個数: 18

約数和(自身を含む): 279498170

約数和(自身を除く): 150697270

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 1288009, 2576018, 5152036, 6440045, 12880090, 25760180, 32200225, 64400450, 128800900]

約数ペア:

[(1, 128800900), (2, 64400450), (4, 32200225), (5, 25760180), (10, 12880090), (20, 6440045), (25, 5152036), (50, 2576018), (100, 1288009)]