81010900

素因数分解:

$2^2\times 5^2\times {\mathrm{810109}}^1$

素因数の和:810123

約数の個数: 18

約数和(自身を含む): 175793870

約数和(自身を除く): 94782970

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 810109, 1620218, 3240436, 4050545, 8101090, 16202180, 20252725, 40505450, 81010900]

約数ペア:

[(1, 81010900), (2, 40505450), (4, 20252725), (5, 16202180), (10, 8101090), (20, 4050545), (25, 3240436), (50, 1620218), (100, 810109)]