20853963

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:153

約数の個数: 64

約数和(自身を含む): 36288000

約数和(自身を除く): 15434037

約数列:

[1, 3, 9, 13, 19, 27, 39, 53, 57, 59, 117, 159, 171, 177, 247, 351, 477, 513, 531, 689, 741, 767, 1007, 1121, 1431, 1593, 2067, 2223, 2301, 3021, 3127, 3363, 6201, 6669, 6903, 9063, 9381, 10089, 13091, 14573, 18603, 20709, 27189, 28143, 30267, 39273, 40651, 43719, 59413, 84429, 117819, 121953, 131157, 178239, 353457, 365859, 393471, 534717, 772369, 1097577, 1604151, 2317107, 6951321, 20853963]

約数ペア:

[(1, 20853963), (3, 6951321), (9, 2317107), (13, 1604151), (19, 1097577), (27, 772369), (39, 534717), (53, 393471), (57, 365859), (59, 353457), (117, 178239), (159, 131157), (171, 121953), (177, 117819), (247, 84429), (351, 59413), (477, 43719), (513, 40651), (531, 39273), (689, 30267), (741, 28143), (767, 27189), (1007, 20709), (1121, 18603), (1431, 14573), (1593, 13091), (2067, 10089), (2223, 9381), (2301, 9063), (3021, 6903), (3127, 6669), (3363, 6201)]