21013900

素因数分解:

$2^2\times 5^2\times {\mathrm{210139}}^1$

素因数の和:210153

約数の個数: 18

約数和(自身を含む): 45600380

約数和(自身を除く): 24586480

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 210139, 420278, 840556, 1050695, 2101390, 4202780, 5253475, 10506950, 21013900]

約数ペア:

[(1, 21013900), (2, 10506950), (4, 5253475), (5, 4202780), (10, 2101390), (20, 1050695), (25, 840556), (50, 420278), (100, 210139)]