21903812

素因数分解:

$2^2\times 7^1\times {\mathrm{389}}^1\times {\mathrm{2011}}^1$

素因数の和:2411

約数の個数: 24

約数和(自身を含む): 43942080

約数和(自身を除く): 22038268

約数列:

[1, 2, 4, 7, 14, 28, 389, 778, 1556, 2011, 2723, 4022, 5446, 8044, 10892, 14077, 28154, 56308, 782279, 1564558, 3129116, 5475953, 10951906, 21903812]

約数ペア:

[(1, 21903812), (2, 10951906), (4, 5475953), (7, 3129116), (14, 1564558), (28, 782279), (389, 56308), (778, 28154), (1556, 14077), (2011, 10892), (2723, 8044), (4022, 5446)]