20808879

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{10889}}^1$

素因数の和:10919

約数の個数: 24

約数和(自身を含む): 34760880

約数和(自身を除く): 13952001

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911, 10889, 32667, 76223, 141557, 228669, 424671, 533561, 990899, 1600683, 2972697, 6936293, 20808879]

約数ペア:

[(1, 20808879), (3, 6936293), (7, 2972697), (13, 1600683), (21, 990899), (39, 533561), (49, 424671), (91, 228669), (147, 141557), (273, 76223), (637, 32667), (1911, 10889)]