20138209

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{587}}^1$

素因数の和:649

約数の個数: 24

約数和(自身を含む): 25824960

約数和(自身を除く): 5686751

約数列:

[1, 7, 13, 29, 91, 169, 203, 377, 587, 1183, 2639, 4109, 4901, 7631, 17023, 34307, 53417, 99203, 119161, 221299, 694421, 1549093, 2876887, 20138209]

約数ペア:

[(1, 20138209), (7, 2876887), (13, 1549093), (29, 694421), (91, 221299), (169, 119161), (203, 99203), (377, 53417), (587, 34307), (1183, 17023), (2639, 7631), (4109, 4901)]