21780198

素因数分解:

$2^1\times 3^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{991}}^1$

素因数の和:1050

約数の個数: 64

約数和(自身を含む): 54282240

約数和(自身を除く): 32502042

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 27, 33, 37, 54, 66, 74, 99, 111, 198, 222, 297, 333, 407, 594, 666, 814, 991, 999, 1221, 1982, 1998, 2442, 2973, 3663, 5946, 7326, 8919, 10901, 10989, 17838, 21802, 21978, 26757, 32703, 36667, 53514, 65406, 73334, 98109, 110001, 196218, 220002, 294327, 330003, 403337, 588654, 660006, 806674, 990009, 1210011, 1980018, 2420022, 3630033, 7260066, 10890099, 21780198]

約数ペア:

[(1, 21780198), (2, 10890099), (3, 7260066), (6, 3630033), (9, 2420022), (11, 1980018), (18, 1210011), (22, 990009), (27, 806674), (33, 660006), (37, 588654), (54, 403337), (66, 330003), (74, 294327), (99, 220002), (111, 196218), (198, 110001), (222, 98109), (297, 73334), (333, 65406), (407, 53514), (594, 36667), (666, 32703), (814, 26757), (991, 21978), (999, 21802), (1221, 17838), (1982, 10989), (1998, 10901), (2442, 8919), (2973, 7326), (3663, 5946)]