18986900

素因数分解:

$2^2\times 5^2\times {\mathrm{181}}^1\times {\mathrm{1049}}^1$

素因数の和:1244

約数の個数: 36

約数和(自身を含む): 41468700

約数和(自身を除く): 22481800

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 181, 362, 724, 905, 1049, 1810, 2098, 3620, 4196, 4525, 5245, 9050, 10490, 18100, 20980, 26225, 52450, 104900, 189869, 379738, 759476, 949345, 1898690, 3797380, 4746725, 9493450, 18986900]

約数ペア:

[(1, 18986900), (2, 9493450), (4, 4746725), (5, 3797380), (10, 1898690), (20, 949345), (25, 759476), (50, 379738), (100, 189869), (181, 104900), (362, 52450), (724, 26225), (905, 20980), (1049, 18100), (1810, 10490), (2098, 9050), (3620, 5245), (4196, 4525)]