21022771

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:259

約数の個数: 32

約数和(自身を含む): 27666432

約数和(自身を除く): 6643661

約数列:

[1, 7, 11, 37, 47, 77, 157, 259, 329, 407, 517, 1099, 1727, 1739, 2849, 3619, 5809, 7379, 12089, 12173, 19129, 40663, 51653, 63899, 81169, 133903, 273023, 447293, 568183, 1911161, 3003253, 21022771]

約数ペア:

[(1, 21022771), (7, 3003253), (11, 1911161), (37, 568183), (47, 447293), (77, 273023), (157, 133903), (259, 81169), (329, 63899), (407, 51653), (517, 40663), (1099, 19129), (1727, 12173), (1739, 12089), (2849, 7379), (3619, 5809)]