28382020

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{2207}}^1$

素因数の和:2859

約数の個数: 24

約数和(自身を含む): 59721984

約数和(自身を除く): 31339964

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 2207, 2572, 3215, 4414, 6430, 8828, 11035, 12860, 22070, 44140, 1419101, 2838202, 5676404, 7095505, 14191010, 28382020]

約数ペア:

[(1, 28382020), (2, 14191010), (4, 7095505), (5, 5676404), (10, 2838202), (20, 1419101), (643, 44140), (1286, 22070), (2207, 12860), (2572, 11035), (3215, 8828), (4414, 6430)]