12920900

素因数分解:

$2^2\times 5^2\times {\mathrm{129209}}^1$

素因数の和:129223

約数の個数: 18

約数和(自身を含む): 28038570

約数和(自身を除く): 15117670

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 129209, 258418, 516836, 646045, 1292090, 2584180, 3230225, 6460450, 12920900]

約数ペア:

[(1, 12920900), (2, 6460450), (4, 3230225), (5, 2584180), (10, 1292090), (20, 646045), (25, 516836), (50, 258418), (100, 129209)]