20656840

素因数分解:

$2^3\times 5^1\times {\mathrm{516421}}^1$

素因数の和:516432

約数の個数: 16

約数和(自身を含む): 46477980

約数和(自身を除く): 25821140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 516421, 1032842, 2065684, 2582105, 4131368, 5164210, 10328420, 20656840]

約数ペア:

[(1, 20656840), (2, 10328420), (4, 5164210), (5, 4131368), (8, 2582105), (10, 2065684), (20, 1032842), (40, 516421)]