21673840

素因数分解:

$2^4\times 5^1\times {\mathrm{270923}}^1$

素因数の和:270936

約数の個数: 20

約数和(自身を含む): 50391864

約数和(自身を除く): 28718024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270923, 541846, 1083692, 1354615, 2167384, 2709230, 4334768, 5418460, 10836920, 21673840]

約数ペア:

[(1, 21673840), (2, 10836920), (4, 5418460), (5, 4334768), (8, 2709230), (10, 2167384), (16, 1354615), (20, 1083692), (40, 541846), (80, 270923)]