21245819

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{5153}}^1$

素因数の和:5210

約数の個数: 16

約数和(自身を含む): 26388480

約数和(自身を除く): 5142661

約数列:

[1, 7, 19, 31, 133, 217, 589, 4123, 5153, 36071, 97907, 159743, 685349, 1118201, 3035117, 21245819]

約数ペア:

[(1, 21245819), (7, 3035117), (19, 1118201), (31, 685349), (133, 159743), (217, 97907), (589, 36071), (4123, 5153)]