20557803

素因数分解:

$3^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{1307}}^1$

素因数の和:1431

約数の個数: 24

約数和(自身を含む): 32208192

約数和(自身を除く): 11650389

約数列:

[1, 3, 7, 21, 49, 107, 147, 321, 749, 1307, 2247, 3921, 5243, 9149, 15729, 27447, 64043, 139849, 192129, 419547, 978943, 2936829, 6852601, 20557803]

約数ペア:

[(1, 20557803), (3, 6852601), (7, 2936829), (21, 978943), (49, 419547), (107, 192129), (147, 139849), (321, 64043), (749, 27447), (1307, 15729), (2247, 9149), (3921, 5243)]