21383747

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{409}}^1$

素因数の和:531

約数の個数: 24

約数和(自身を含む): 27483120

約数和(自身を除く): 6099373

約数列:

[1, 7, 11, 49, 77, 97, 409, 539, 679, 1067, 2863, 4499, 4753, 7469, 20041, 31493, 39673, 52283, 220451, 277711, 436403, 1943977, 3054821, 21383747]

約数ペア:

[(1, 21383747), (7, 3054821), (11, 1943977), (49, 436403), (77, 277711), (97, 220451), (409, 52283), (539, 39673), (679, 31493), (1067, 20041), (2863, 7469), (4499, 4753)]