28220654

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:209

約数の個数: 64

約数和(自身を含む): 55987200

約数和(自身を除く): 27766546

約数列:

[1, 2, 7, 11, 14, 22, 29, 58, 71, 77, 89, 142, 154, 178, 203, 319, 406, 497, 623, 638, 781, 979, 994, 1246, 1562, 1958, 2059, 2233, 2581, 4118, 4466, 5162, 5467, 6319, 6853, 10934, 12638, 13706, 14413, 18067, 22649, 28391, 28826, 36134, 44233, 45298, 56782, 69509, 88466, 139018, 158543, 183251, 198737, 317086, 366502, 397474, 486563, 973126, 1282757, 2015761, 2565514, 4031522, 14110327, 28220654]

約数ペア:

[(1, 28220654), (2, 14110327), (7, 4031522), (11, 2565514), (14, 2015761), (22, 1282757), (29, 973126), (58, 486563), (71, 397474), (77, 366502), (89, 317086), (142, 198737), (154, 183251), (178, 158543), (203, 139018), (319, 88466), (406, 69509), (497, 56782), (623, 45298), (638, 44233), (781, 36134), (979, 28826), (994, 28391), (1246, 22649), (1562, 18067), (1958, 14413), (2059, 13706), (2233, 12638), (2581, 10934), (4118, 6853), (4466, 6319), (5162, 5467)]