21738951

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 36036000

約数和(自身を除く): 14297049

約数列:

[1, 3, 9, 13, 29, 39, 43, 87, 117, 129, 149, 261, 377, 387, 447, 559, 1131, 1247, 1341, 1677, 1937, 3393, 3741, 4321, 5031, 5811, 6407, 11223, 12963, 16211, 17433, 19221, 38889, 48633, 56173, 57663, 83291, 145899, 168519, 185803, 249873, 505557, 557409, 749619, 1672227, 2415439, 7246317, 21738951]

約数ペア:

[(1, 21738951), (3, 7246317), (9, 2415439), (13, 1672227), (29, 749619), (39, 557409), (43, 505557), (87, 249873), (117, 185803), (129, 168519), (149, 145899), (261, 83291), (377, 57663), (387, 56173), (447, 48633), (559, 38889), (1131, 19221), (1247, 17433), (1341, 16211), (1677, 12963), (1937, 11223), (3393, 6407), (3741, 5811), (4321, 5031)]