257788665

素因数分解:

$3^2\times 5^1\times {\mathrm{277}}^1\times {\mathrm{20681}}^1$

素因数の和:20969

約数の個数: 24

約数和(自身を含む): 448468488

約数和(自身を除く): 190679823

約数列:

[1, 3, 5, 9, 15, 45, 277, 831, 1385, 2493, 4155, 12465, 20681, 62043, 103405, 186129, 310215, 930645, 5728637, 17185911, 28643185, 51557733, 85929555, 257788665]

約数ペア:

[(1, 257788665), (3, 85929555), (5, 51557733), (9, 28643185), (15, 17185911), (45, 5728637), (277, 930645), (831, 310215), (1385, 186129), (2493, 103405), (4155, 62043), (12465, 20681)]