21909016

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{63689}}^1$

素因数の和:63738

約数の個数: 16

約数和(自身を含む): 42035400

約数和(自身を除く): 20126384

約数列:

[1, 2, 4, 8, 43, 86, 172, 344, 63689, 127378, 254756, 509512, 2738627, 5477254, 10954508, 21909016]

約数ペア:

[(1, 21909016), (2, 10954508), (4, 5477254), (8, 2738627), (43, 509512), (86, 254756), (172, 127378), (344, 63689)]