21691747

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{6871}}^1$

素因数の和:6930

約数の個数: 16

約数和(自身を含む): 27707904

約数和(自身を除く): 6016157

約数列:

[1, 7, 11, 41, 77, 287, 451, 3157, 6871, 48097, 75581, 281711, 529067, 1971977, 3098821, 21691747]

約数ペア:

[(1, 21691747), (7, 3098821), (11, 1971977), (41, 529067), (77, 281711), (287, 75581), (451, 48097), (3157, 6871)]