21707469

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 38098944

約数和(自身を除く): 16391475

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 71, 161, 207, 211, 213, 483, 497, 633, 639, 1449, 1477, 1491, 1633, 1899, 4431, 4473, 4853, 4899, 11431, 13293, 14559, 14697, 14981, 33971, 34293, 43677, 44943, 101913, 102879, 104867, 134829, 305739, 314601, 344563, 943803, 1033689, 2411941, 3101067, 7235823, 21707469]

約数ペア:

[(1, 21707469), (3, 7235823), (7, 3101067), (9, 2411941), (21, 1033689), (23, 943803), (63, 344563), (69, 314601), (71, 305739), (161, 134829), (207, 104867), (211, 102879), (213, 101913), (483, 44943), (497, 43677), (633, 34293), (639, 33971), (1449, 14981), (1477, 14697), (1491, 14559), (1633, 13293), (1899, 11431), (4431, 4899), (4473, 4853)]