21286749

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{15733}}^1$

素因数の和:15788

約数の個数: 16

約数和(自身を含む): 31719744

約数和(自身を除く): 10432995

約数列:

[1, 3, 11, 33, 41, 123, 451, 1353, 15733, 47199, 173063, 519189, 645053, 1935159, 7095583, 21286749]

約数ペア:

[(1, 21286749), (3, 7095583), (11, 1935159), (33, 645053), (41, 519189), (123, 173063), (451, 47199), (1353, 15733)]