20687821

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{6553}}^1$

素因数の和:6612

約数の個数: 16

約数和(自身を含む): 26425728

約数和(自身を除く): 5737907

約数列:

[1, 7, 11, 41, 77, 287, 451, 3157, 6553, 45871, 72083, 268673, 504581, 1880711, 2955403, 20687821]

約数ペア:

[(1, 20687821), (7, 2955403), (11, 1880711), (41, 504581), (77, 268673), (287, 72083), (451, 45871), (3157, 6553)]