20702143

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 27279360

約数和(自身を除く): 6577217

約数列:

[1, 7, 11, 29, 73, 77, 127, 203, 319, 511, 803, 889, 1397, 2117, 2233, 3683, 5621, 9271, 9779, 14819, 23287, 25781, 40513, 64897, 101981, 163009, 268859, 283591, 713867, 1882013, 2957449, 20702143]

約数ペア:

[(1, 20702143), (7, 2957449), (11, 1882013), (29, 713867), (73, 283591), (77, 268859), (127, 163009), (203, 101981), (319, 64897), (511, 40513), (803, 25781), (889, 23287), (1397, 14819), (2117, 9779), (2233, 9271), (3683, 5621)]