20909889

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{211}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 41053376

約数和(自身を除く): 20143487

約数列:

[1, 3, 7, 9, 11, 13, 21, 33, 39, 63, 77, 91, 99, 117, 121, 143, 211, 231, 273, 363, 429, 633, 693, 819, 847, 1001, 1089, 1287, 1477, 1573, 1899, 2321, 2541, 2743, 3003, 4431, 4719, 6963, 7623, 8229, 9009, 11011, 13293, 14157, 16247, 19201, 20889, 24687, 25531, 30173, 33033, 48741, 57603, 76593, 90519, 99099, 146223, 172809, 178717, 211211, 229779, 271557, 331903, 536151, 633633, 995709, 1608453, 1900899, 2323321, 2987127, 6969963, 20909889]

約数ペア:

[(1, 20909889), (3, 6969963), (7, 2987127), (9, 2323321), (11, 1900899), (13, 1608453), (21, 995709), (33, 633633), (39, 536151), (63, 331903), (77, 271557), (91, 229779), (99, 211211), (117, 178717), (121, 172809), (143, 146223), (211, 99099), (231, 90519), (273, 76593), (363, 57603), (429, 48741), (633, 33033), (693, 30173), (819, 25531), (847, 24687), (1001, 20889), (1089, 19201), (1287, 16247), (1477, 14157), (1573, 13293), (1899, 11011), (2321, 9009), (2541, 8229), (2743, 7623), (3003, 6963), (4431, 4719)]