21141883

素因数分解:

$7^2\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:247

約数の個数: 24

約数和(自身を含む): 25608960

約数和(自身を除く): 4467077

約数列:

[1, 7, 49, 59, 71, 103, 413, 497, 721, 2891, 3479, 4189, 5047, 6077, 7313, 29323, 42539, 51191, 205261, 297773, 358337, 431467, 3020269, 21141883]

約数ペア:

[(1, 21141883), (7, 3020269), (49, 431467), (59, 358337), (71, 297773), (103, 205261), (413, 51191), (497, 42539), (721, 29323), (2891, 7313), (3479, 6077), (4189, 5047)]