21080187

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{4751}}^1$

素因数の和:4803

約数の個数: 24

約数和(自身を含む): 33359040

約数和(自身を除く): 12278853

約数列:

[1, 3, 9, 17, 29, 51, 87, 153, 261, 493, 1479, 4437, 4751, 14253, 42759, 80767, 137779, 242301, 413337, 726903, 1240011, 2342243, 7026729, 21080187]

約数ペア:

[(1, 21080187), (3, 7026729), (9, 2342243), (17, 1240011), (29, 726903), (51, 413337), (87, 242301), (153, 137779), (261, 80767), (493, 42759), (1479, 14253), (4437, 4751)]