20000900

素因数分解:

$2^2\times 5^2\times {\mathrm{200009}}^1$

素因数の和:200023

約数の個数: 18

約数和(自身を含む): 43402170

約数和(自身を除く): 23401270

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 200009, 400018, 800036, 1000045, 2000090, 4000180, 5000225, 10000450, 20000900]

約数ペア:

[(1, 20000900), (2, 10000450), (4, 5000225), (5, 4000180), (10, 2000090), (20, 1000045), (25, 800036), (50, 400018), (100, 200009)]