21421708

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{443}}^1$

素因数の和:622

約数の個数: 48

約数和(自身を含む): 47142144

約数和(自身を除く): 25720436

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 157, 308, 314, 443, 628, 886, 1099, 1727, 1772, 2198, 3101, 3454, 4396, 4873, 6202, 6908, 9746, 12089, 12404, 19492, 24178, 34111, 48356, 68222, 69551, 136444, 139102, 278204, 486857, 765061, 973714, 1530122, 1947428, 3060244, 5355427, 10710854, 21421708]

約数ペア:

[(1, 21421708), (2, 10710854), (4, 5355427), (7, 3060244), (11, 1947428), (14, 1530122), (22, 973714), (28, 765061), (44, 486857), (77, 278204), (154, 139102), (157, 136444), (308, 69551), (314, 68222), (443, 48356), (628, 34111), (886, 24178), (1099, 19492), (1727, 12404), (1772, 12089), (2198, 9746), (3101, 6908), (3454, 6202), (4396, 4873)]