21072821

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{9437}}^1$

素因数の和:9484

約数の個数: 16

約数和(自身を含む): 27181440

約数和(自身を除く): 6108619

約数列:

[1, 7, 11, 29, 77, 203, 319, 2233, 9437, 66059, 103807, 273673, 726649, 1915711, 3010403, 21072821]

約数ペア:

[(1, 21072821), (7, 3010403), (11, 1915711), (29, 726649), (77, 273673), (203, 103807), (319, 66059), (2233, 9437)]