21116557

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{107}}^1\times {\mathrm{233}}^1$

素因数の和:369

約数の個数: 24

約数和(自身を含む): 26889408

約数和(自身を除く): 5772851

約数列:

[1, 7, 11, 77, 107, 121, 233, 749, 847, 1177, 1631, 2563, 8239, 12947, 17941, 24931, 28193, 90629, 174517, 197351, 274241, 1919687, 3016651, 21116557]

約数ペア:

[(1, 21116557), (7, 3016651), (11, 1919687), (77, 274241), (107, 197351), (121, 174517), (233, 90629), (749, 28193), (847, 24931), (1177, 17941), (1631, 12947), (2563, 8239)]