20640820

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{27893}}^1$

素因数の和:27939

約数の個数: 24

約数和(自身を含む): 44518824

約数和(自身を除く): 23878004

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 740, 27893, 55786, 111572, 139465, 278930, 557860, 1032041, 2064082, 4128164, 5160205, 10320410, 20640820]

約数ペア:

[(1, 20640820), (2, 10320410), (4, 5160205), (5, 4128164), (10, 2064082), (20, 1032041), (37, 557860), (74, 278930), (148, 139465), (185, 111572), (370, 55786), (740, 27893)]