20405205

素因数分解:

$3^2\times 5^1\times {\mathrm{277}}^1\times {\mathrm{1637}}^1$

素因数の和:1925

約数の個数: 24

約数和(自身を含む): 35518392

約数和(自身を除く): 15113187

約数列:

[1, 3, 5, 9, 15, 45, 277, 831, 1385, 1637, 2493, 4155, 4911, 8185, 12465, 14733, 24555, 73665, 453449, 1360347, 2267245, 4081041, 6801735, 20405205]

約数ペア:

[(1, 20405205), (3, 6801735), (5, 4081041), (9, 2267245), (15, 1360347), (45, 453449), (277, 73665), (831, 24555), (1385, 14733), (1637, 12465), (2493, 8185), (4155, 4911)]