21047649

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{107}}^1$

素因数の和:182

約数の個数: 64

約数和(自身を含む): 37324800

約数和(自身を除く): 16277151

約数列:

[1, 3, 7, 17, 19, 21, 29, 51, 57, 87, 107, 119, 133, 203, 321, 323, 357, 399, 493, 551, 609, 749, 969, 1479, 1653, 1819, 2033, 2247, 2261, 3103, 3451, 3857, 5457, 6099, 6783, 9309, 9367, 10353, 11571, 12733, 14231, 21721, 28101, 34561, 38199, 42693, 52751, 58957, 65163, 65569, 103683, 158253, 176871, 196707, 241927, 369257, 412699, 725781, 1002269, 1107771, 1238097, 3006807, 7015883, 21047649]

約数ペア:

[(1, 21047649), (3, 7015883), (7, 3006807), (17, 1238097), (19, 1107771), (21, 1002269), (29, 725781), (51, 412699), (57, 369257), (87, 241927), (107, 196707), (119, 176871), (133, 158253), (203, 103683), (321, 65569), (323, 65163), (357, 58957), (399, 52751), (493, 42693), (551, 38199), (609, 34561), (749, 28101), (969, 21721), (1479, 14231), (1653, 12733), (1819, 11571), (2033, 10353), (2247, 9367), (2261, 9309), (3103, 6783), (3451, 6099), (3857, 5457)]