20815705521

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^2\times {\mathrm{1217}}^1$

素因数の和:1407

約数の個数: 72

約数和(自身を含む): 34002881640

約数和(自身を除く): 13187176119

約数列:

[1, 3, 9, 13, 29, 39, 71, 87, 117, 213, 261, 377, 639, 923, 1131, 1217, 2059, 2769, 3393, 3651, 5041, 6177, 8307, 10953, 15123, 15821, 18531, 26767, 35293, 45369, 47463, 65533, 80301, 86407, 105879, 142389, 146189, 196599, 240903, 259221, 317637, 438567, 458809, 589797, 777663, 1123291, 1315701, 1376427, 1900457, 2505803, 3369873, 4129281, 5701371, 6134897, 7517409, 10109619, 17104113, 18404691, 22552227, 32575439, 55214073, 79753661, 97726317, 177912013, 239260983, 293178951, 533736039, 717782949, 1601208117, 2312856169, 6938568507, 20815705521]

約数ペア:

[(1, 20815705521), (3, 6938568507), (9, 2312856169), (13, 1601208117), (29, 717782949), (39, 533736039), (71, 293178951), (87, 239260983), (117, 177912013), (213, 97726317), (261, 79753661), (377, 55214073), (639, 32575439), (923, 22552227), (1131, 18404691), (1217, 17104113), (2059, 10109619), (2769, 7517409), (3393, 6134897), (3651, 5701371), (5041, 4129281), (6177, 3369873), (8307, 2505803), (10953, 1900457), (15123, 1376427), (15821, 1315701), (18531, 1123291), (26767, 777663), (35293, 589797), (45369, 458809), (47463, 438567), (65533, 317637), (80301, 259221), (86407, 240903), (105879, 196599), (142389, 146189)]