20857837

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{311}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 28514304

約数和(自身を除く): 7656467

約数列:

[1, 7, 11, 13, 67, 77, 91, 143, 311, 469, 737, 871, 1001, 2177, 3421, 4043, 5159, 6097, 9581, 20837, 23947, 28301, 44473, 67067, 145859, 229207, 270881, 311311, 1604449, 1896167, 2979691, 20857837]

約数ペア:

[(1, 20857837), (7, 2979691), (11, 1896167), (13, 1604449), (67, 311311), (77, 270881), (91, 229207), (143, 145859), (311, 67067), (469, 44473), (737, 28301), (871, 23947), (1001, 20837), (2177, 9581), (3421, 6097), (4043, 5159)]