20478717

素因数分解:

$3^3\times 7^2\times {\mathrm{23}}^1\times {\mathrm{673}}^1$

素因数の和:719

約数の個数: 48

約数和(自身を含む): 36881280

約数和(自身を除く): 16402563

約数列:

[1, 3, 7, 9, 21, 23, 27, 49, 63, 69, 147, 161, 189, 207, 441, 483, 621, 673, 1127, 1323, 1449, 2019, 3381, 4347, 4711, 6057, 10143, 14133, 15479, 18171, 30429, 32977, 42399, 46437, 98931, 108353, 127197, 139311, 296793, 325059, 417933, 758471, 890379, 975177, 2275413, 2925531, 6826239, 20478717]

約数ペア:

[(1, 20478717), (3, 6826239), (7, 2925531), (9, 2275413), (21, 975177), (23, 890379), (27, 758471), (49, 417933), (63, 325059), (69, 296793), (147, 139311), (161, 127197), (189, 108353), (207, 98931), (441, 46437), (483, 42399), (621, 32977), (673, 30429), (1127, 18171), (1323, 15479), (1449, 14133), (2019, 10143), (3381, 6057), (4347, 4711)]