20681620

素因数分解:

$2^2\times 5^1\times {\mathrm{571}}^1\times {\mathrm{1811}}^1$

素因数の和:2391

約数の個数: 24

約数和(自身を含む): 43531488

約数和(自身を除く): 22849868

約数列:

[1, 2, 4, 5, 10, 20, 571, 1142, 1811, 2284, 2855, 3622, 5710, 7244, 9055, 11420, 18110, 36220, 1034081, 2068162, 4136324, 5170405, 10340810, 20681620]

約数ペア:

[(1, 20681620), (2, 10340810), (4, 5170405), (5, 4136324), (10, 2068162), (20, 1034081), (571, 36220), (1142, 18110), (1811, 11420), (2284, 9055), (2855, 7244), (3622, 5710)]