21010900

素因数分解:

$2^2\times 5^2\times {\mathrm{210109}}^1$

素因数の和:210123

約数の個数: 18

約数和(自身を含む): 45593870

約数和(自身を除く): 24582970

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 210109, 420218, 840436, 1050545, 2101090, 4202180, 5252725, 10505450, 21010900]

約数ペア:

[(1, 21010900), (2, 10505450), (4, 5252725), (5, 4202180), (10, 2101090), (20, 1050545), (25, 840436), (50, 420218), (100, 210109)]