21456909

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{701}}^1$

素因数の和:905

約数の個数: 24

約数和(自身を含む): 32853600

約数和(自身を除く): 11396691

約数列:

[1, 3, 9, 19, 57, 171, 179, 537, 701, 1611, 2103, 3401, 6309, 10203, 13319, 30609, 39957, 119871, 125479, 376437, 1129311, 2384101, 7152303, 21456909]

約数ペア:

[(1, 21456909), (3, 7152303), (9, 2384101), (19, 1129311), (57, 376437), (171, 125479), (179, 119871), (537, 39957), (701, 30609), (1611, 13319), (2103, 10203), (3401, 6309)]