21571389

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{11807}}^1$

素因数の和:11849

約数の個数: 24

約数和(自身を含む): 36840960

約数和(自身を除く): 15269571

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827, 11807, 35421, 82649, 106263, 247947, 342403, 743841, 1027209, 2396821, 3081627, 7190463, 21571389]

約数ペア:

[(1, 21571389), (3, 7190463), (7, 3081627), (9, 2396821), (21, 1027209), (29, 743841), (63, 342403), (87, 247947), (203, 106263), (261, 82649), (609, 35421), (1827, 11807)]