20781219

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1\times {\mathrm{1579}}^1$

素因数の和:1730

約数の個数: 16

約数和(自身を含む): 28667520

約数和(自身を除く): 7886301

約数列:

[1, 3, 41, 107, 123, 321, 1579, 4387, 4737, 13161, 64739, 168953, 194217, 506859, 6927073, 20781219]

約数ペア:

[(1, 20781219), (3, 6927073), (41, 506859), (107, 194217), (123, 168953), (321, 64739), (1579, 13161), (4387, 4737)]