18161800

素因数分解:

$2^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1279}}^1$

素因数の和:1366

約数の個数: 48

約数和(自身を含む): 42854400

約数和(自身を除く): 24692600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 71, 100, 142, 200, 284, 355, 568, 710, 1279, 1420, 1775, 2558, 2840, 3550, 5116, 6395, 7100, 10232, 12790, 14200, 25580, 31975, 51160, 63950, 90809, 127900, 181618, 255800, 363236, 454045, 726472, 908090, 1816180, 2270225, 3632360, 4540450, 9080900, 18161800]

約数ペア:

[(1, 18161800), (2, 9080900), (4, 4540450), (5, 3632360), (8, 2270225), (10, 1816180), (20, 908090), (25, 726472), (40, 454045), (50, 363236), (71, 255800), (100, 181618), (142, 127900), (200, 90809), (284, 63950), (355, 51160), (568, 31975), (710, 25580), (1279, 14200), (1420, 12790), (1775, 10232), (2558, 7100), (2840, 6395), (3550, 5116)]