28213785

素因数分解:

$3^3\times 5^1\times {\mathrm{208991}}^1$

素因数の和:209005

約数の個数: 16

約数和(自身を含む): 50158080

約数和(自身を除く): 21944295

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 208991, 626973, 1044955, 1880919, 3134865, 5642757, 9404595, 28213785]

約数ペア:

[(1, 28213785), (3, 9404595), (5, 5642757), (9, 3134865), (15, 1880919), (27, 1044955), (45, 626973), (135, 208991)]