20820085

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{787}}^1$

素因数の和:853

約数の個数: 32

約数和(自身を含む): 30183552

約数和(自身を除く): 9363467

約数列:

[1, 5, 11, 13, 37, 55, 65, 143, 185, 407, 481, 715, 787, 2035, 2405, 3935, 5291, 8657, 10231, 26455, 29119, 43285, 51155, 112541, 145595, 320309, 378547, 562705, 1601545, 1892735, 4164017, 20820085]

約数ペア:

[(1, 20820085), (5, 4164017), (11, 1892735), (13, 1601545), (37, 562705), (55, 378547), (65, 320309), (143, 145595), (185, 112541), (407, 51155), (481, 43285), (715, 29119), (787, 26455), (2035, 10231), (2405, 8657), (3935, 5291)]