21804951

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{211}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 36735360

約数和(自身を除く): 14930409

約数列:

[1, 3, 7, 19, 21, 37, 49, 57, 111, 133, 147, 211, 259, 399, 633, 703, 777, 931, 1477, 1813, 2109, 2793, 4009, 4431, 4921, 5439, 7807, 10339, 12027, 14763, 23421, 28063, 31017, 34447, 54649, 84189, 103341, 148333, 163947, 196441, 382543, 444999, 589323, 1038331, 1147629, 3114993, 7268317, 21804951]

約数ペア:

[(1, 21804951), (3, 7268317), (7, 3114993), (19, 1147629), (21, 1038331), (37, 589323), (49, 444999), (57, 382543), (111, 196441), (133, 163947), (147, 148333), (211, 103341), (259, 84189), (399, 54649), (633, 34447), (703, 31017), (777, 28063), (931, 23421), (1477, 14763), (1813, 12027), (2109, 10339), (2793, 7807), (4009, 5439), (4431, 4921)]