21084651

素因数分解:

$3^3\times 7^2\times {\mathrm{15937}}^1$

素因数の和:15960

約数の個数: 24

約数和(自身を含む): 36338640

約数和(自身を除く): 15253989

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 15937, 47811, 111559, 143433, 334677, 430299, 780913, 1004031, 2342739, 3012093, 7028217, 21084651]

約数ペア:

[(1, 21084651), (3, 7028217), (7, 3012093), (9, 2342739), (21, 1004031), (27, 780913), (49, 430299), (63, 334677), (147, 143433), (189, 111559), (441, 47811), (1323, 15937)]