21287728

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{467}}^1$

素因数の和:530

約数の個数: 80

約数和(自身を含む): 52925184

約数和(自身を除く): 31637456

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 37, 44, 56, 74, 77, 88, 112, 148, 154, 176, 259, 296, 308, 407, 467, 518, 592, 616, 814, 934, 1036, 1232, 1628, 1868, 2072, 2849, 3256, 3269, 3736, 4144, 5137, 5698, 6512, 6538, 7472, 10274, 11396, 13076, 17279, 20548, 22792, 26152, 34558, 35959, 41096, 45584, 52304, 69116, 71918, 82192, 120953, 138232, 143836, 190069, 241906, 276464, 287672, 380138, 483812, 575344, 760276, 967624, 1330483, 1520552, 1935248, 2660966, 3041104, 5321932, 10643864, 21287728]

約数ペア:

[(1, 21287728), (2, 10643864), (4, 5321932), (7, 3041104), (8, 2660966), (11, 1935248), (14, 1520552), (16, 1330483), (22, 967624), (28, 760276), (37, 575344), (44, 483812), (56, 380138), (74, 287672), (77, 276464), (88, 241906), (112, 190069), (148, 143836), (154, 138232), (176, 120953), (259, 82192), (296, 71918), (308, 69116), (407, 52304), (467, 45584), (518, 41096), (592, 35959), (616, 34558), (814, 26152), (934, 22792), (1036, 20548), (1232, 17279), (1628, 13076), (1868, 11396), (2072, 10274), (2849, 7472), (3256, 6538), (3269, 6512), (3736, 5698), (4144, 5137)]