20771541

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:143

約数の個数: 72

約数和(自身を含む): 38294880

約数和(自身を除く): 17523339

約数列:

[1, 3, 7, 9, 19, 21, 37, 49, 57, 63, 67, 111, 133, 147, 171, 201, 259, 333, 399, 441, 469, 603, 703, 777, 931, 1197, 1273, 1407, 1813, 2109, 2331, 2479, 2793, 3283, 3819, 4221, 4921, 5439, 6327, 7437, 8379, 8911, 9849, 11457, 14763, 16317, 17353, 22311, 26733, 29547, 34447, 44289, 47101, 52059, 62377, 80199, 103341, 121471, 141303, 156177, 187131, 310023, 329707, 364413, 423909, 561393, 989121, 1093239, 2307949, 2967363, 6923847, 20771541]

約数ペア:

[(1, 20771541), (3, 6923847), (7, 2967363), (9, 2307949), (19, 1093239), (21, 989121), (37, 561393), (49, 423909), (57, 364413), (63, 329707), (67, 310023), (111, 187131), (133, 156177), (147, 141303), (171, 121471), (201, 103341), (259, 80199), (333, 62377), (399, 52059), (441, 47101), (469, 44289), (603, 34447), (703, 29547), (777, 26733), (931, 22311), (1197, 17353), (1273, 16317), (1407, 14763), (1813, 11457), (2109, 9849), (2331, 8911), (2479, 8379), (2793, 7437), (3283, 6327), (3819, 5439), (4221, 4921)]