21222789

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{157}}^2$

素因数の和:365

約数の個数: 24

約数和(自身を含む): 33340608

約数和(自身を除く): 12117819

約数列:

[1, 3, 7, 21, 41, 123, 157, 287, 471, 861, 1099, 3297, 6437, 19311, 24649, 45059, 73947, 135177, 172543, 517629, 1010609, 3031827, 7074263, 21222789]

約数ペア:

[(1, 21222789), (3, 7074263), (7, 3031827), (21, 1010609), (41, 517629), (123, 172543), (157, 135177), (287, 73947), (471, 45059), (861, 24649), (1099, 19311), (3297, 6437)]