20947641

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{193}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 34677888

約数和(自身を除く): 13730247

約数列:

[1, 3, 11, 13, 23, 33, 39, 69, 121, 143, 193, 253, 299, 363, 429, 579, 759, 897, 1573, 2123, 2509, 2783, 3289, 4439, 4719, 6369, 7527, 8349, 9867, 13317, 23353, 27599, 36179, 48829, 57707, 70059, 82797, 108537, 146487, 173121, 303589, 537119, 634777, 910767, 1611357, 1904331, 6982547, 20947641]

約数ペア:

[(1, 20947641), (3, 6982547), (11, 1904331), (13, 1611357), (23, 910767), (33, 634777), (39, 537119), (69, 303589), (121, 173121), (143, 146487), (193, 108537), (253, 82797), (299, 70059), (363, 57707), (429, 48829), (579, 36179), (759, 27599), (897, 23353), (1573, 13317), (2123, 9867), (2509, 8349), (2783, 7527), (3289, 6369), (4439, 4719)]