20784445

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1$

素因数の和:285

約数の個数: 32

約数和(自身を含む): 28667520

約数和(自身を除く): 7883075

約数列:

[1, 5, 11, 29, 55, 83, 145, 157, 319, 415, 785, 913, 1595, 1727, 2407, 4553, 4565, 8635, 12035, 13031, 22765, 26477, 50083, 65155, 132385, 143341, 250415, 377899, 716705, 1889495, 4156889, 20784445]

約数ペア:

[(1, 20784445), (5, 4156889), (11, 1889495), (29, 716705), (55, 377899), (83, 250415), (145, 143341), (157, 132385), (319, 65155), (415, 50083), (785, 26477), (913, 22765), (1595, 13031), (1727, 12035), (2407, 8635), (4553, 4565)]