20880920

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7151}}^1$

素因数の和:7235

約数の個数: 32

約数和(自身を含む): 47632320

約数和(自身を除く): 26751400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7151, 14302, 28604, 35755, 57208, 71510, 143020, 286040, 522023, 1044046, 2088092, 2610115, 4176184, 5220230, 10440460, 20880920]

約数ペア:

[(1, 20880920), (2, 10440460), (4, 5220230), (5, 4176184), (8, 2610115), (10, 2088092), (20, 1044046), (40, 522023), (73, 286040), (146, 143020), (292, 71510), (365, 57208), (584, 35755), (730, 28604), (1460, 14302), (2920, 7151)]