20790945

素因数分解:

$3^3\times 5^1\times 7^3\times {\mathrm{449}}^1$

素因数の和:484

約数の個数: 64

約数和(自身を含む): 43200000

約数和(自身を除く): 22409055

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 105, 135, 147, 189, 245, 315, 343, 441, 449, 735, 945, 1029, 1323, 1347, 1715, 2205, 2245, 3087, 3143, 4041, 5145, 6615, 6735, 9261, 9429, 12123, 15435, 15715, 20205, 22001, 28287, 46305, 47145, 60615, 66003, 84861, 110005, 141435, 154007, 198009, 330015, 424305, 462021, 594027, 770035, 990045, 1386063, 2310105, 2970135, 4158189, 6930315, 20790945]

約数ペア:

[(1, 20790945), (3, 6930315), (5, 4158189), (7, 2970135), (9, 2310105), (15, 1386063), (21, 990045), (27, 770035), (35, 594027), (45, 462021), (49, 424305), (63, 330015), (105, 198009), (135, 154007), (147, 141435), (189, 110005), (245, 84861), (315, 66003), (343, 60615), (441, 47145), (449, 46305), (735, 28287), (945, 22001), (1029, 20205), (1323, 15715), (1347, 15435), (1715, 12123), (2205, 9429), (2245, 9261), (3087, 6735), (3143, 6615), (4041, 5145)]