21001900

素因数分解:

$2^2\times 5^2\times {\mathrm{210019}}^1$

素因数の和:210033

約数の個数: 18

約数和(自身を含む): 45574340

約数和(自身を除く): 24572440

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 210019, 420038, 840076, 1050095, 2100190, 4200380, 5250475, 10500950, 21001900]

約数ペア:

[(1, 21001900), (2, 10500950), (4, 5250475), (5, 4200380), (10, 2100190), (20, 1050095), (25, 840076), (50, 420038), (100, 210019)]