20976561

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{809}}^1$

素因数の和:925

約数の個数: 24

約数和(自身を含む): 31505760

約数和(自身を除く): 10529199

約数列:

[1, 3, 9, 43, 67, 129, 201, 387, 603, 809, 2427, 2881, 7281, 8643, 25929, 34787, 54203, 104361, 162609, 313083, 487827, 2330729, 6992187, 20976561]

約数ペア:

[(1, 20976561), (3, 6992187), (9, 2330729), (43, 487827), (67, 313083), (129, 162609), (201, 104361), (387, 54203), (603, 34787), (809, 25929), (2427, 8643), (2881, 7281)]