123020821

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{20749}}^1$

素因数の和:20785

約数の個数: 18

約数和(自身を含む): 157305750

約数和(自身を除く): 34284929

約数列:

[1, 7, 11, 49, 77, 121, 539, 847, 5929, 20749, 145243, 228239, 1016701, 1597673, 2510629, 11183711, 17574403, 123020821]

約数ペア:

[(1, 123020821), (7, 17574403), (11, 11183711), (49, 2510629), (77, 1597673), (121, 1016701), (539, 228239), (847, 145243), (5929, 20749)]