388300540

素因数分解:

$2^2\times 5^1\times {\mathrm{691}}^1\times {\mathrm{28097}}^1$

素因数の和:28797

約数の個数: 24

約数和(自身を含む): 816640272

約数和(自身を除く): 428339732

約数列:

[1, 2, 4, 5, 10, 20, 691, 1382, 2764, 3455, 6910, 13820, 28097, 56194, 112388, 140485, 280970, 561940, 19415027, 38830054, 77660108, 97075135, 194150270, 388300540]

約数ペア:

[(1, 388300540), (2, 194150270), (4, 97075135), (5, 77660108), (10, 38830054), (20, 19415027), (691, 561940), (1382, 280970), (2764, 140485), (3455, 112388), (6910, 56194), (13820, 28097)]