21623121

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:246

約数の個数: 48

約数和(自身を含む): 36167040

約数和(自身を除く): 14543919

約数列:

[1, 3, 9, 13, 19, 39, 57, 71, 117, 137, 171, 213, 247, 411, 639, 741, 923, 1233, 1349, 1781, 2223, 2603, 2769, 4047, 5343, 7809, 8307, 9727, 12141, 16029, 17537, 23427, 29181, 33839, 52611, 87543, 101517, 126451, 157833, 184813, 304551, 379353, 554439, 1138059, 1663317, 2402569, 7207707, 21623121]

約数ペア:

[(1, 21623121), (3, 7207707), (9, 2402569), (13, 1663317), (19, 1138059), (39, 554439), (57, 379353), (71, 304551), (117, 184813), (137, 157833), (171, 126451), (213, 101517), (247, 87543), (411, 52611), (639, 33839), (741, 29181), (923, 23427), (1233, 17537), (1349, 16029), (1781, 12141), (2223, 9727), (2603, 8307), (2769, 7809), (4047, 5343)]