19819863

素因数分解:

$3^3\times 7^2\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:305

約数の個数: 48

約数和(自身を含む): 34801920

約数和(自身を除く): 14982057

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 71, 147, 189, 211, 213, 441, 497, 633, 639, 1323, 1477, 1491, 1899, 1917, 3479, 4431, 4473, 5697, 10339, 10437, 13293, 13419, 14981, 31017, 31311, 39879, 44943, 93051, 93933, 104867, 134829, 279153, 314601, 404487, 734069, 943803, 2202207, 2831409, 6606621, 19819863]

約数ペア:

[(1, 19819863), (3, 6606621), (7, 2831409), (9, 2202207), (21, 943803), (27, 734069), (49, 404487), (63, 314601), (71, 279153), (147, 134829), (189, 104867), (211, 93933), (213, 93051), (441, 44943), (497, 39879), (633, 31311), (639, 31017), (1323, 14981), (1477, 13419), (1491, 13293), (1899, 10437), (1917, 10339), (3479, 5697), (4431, 4473)]