20841381

素因数分解:

$3^6\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1$

素因数の和:165

約数の個数: 56

約数和(自身を含む): 35885376

約数和(自身を除く): 15043995

約数列:

[1, 3, 9, 11, 23, 27, 33, 69, 81, 99, 113, 207, 243, 253, 297, 339, 621, 729, 759, 891, 1017, 1243, 1863, 2277, 2599, 2673, 3051, 3729, 5589, 6831, 7797, 8019, 9153, 11187, 16767, 20493, 23391, 27459, 28589, 33561, 61479, 70173, 82377, 85767, 100683, 184437, 210519, 257301, 302049, 631557, 771903, 906147, 1894671, 2315709, 6947127, 20841381]

約数ペア:

[(1, 20841381), (3, 6947127), (9, 2315709), (11, 1894671), (23, 906147), (27, 771903), (33, 631557), (69, 302049), (81, 257301), (99, 210519), (113, 184437), (207, 100683), (243, 85767), (253, 82377), (297, 70173), (339, 61479), (621, 33561), (729, 28589), (759, 27459), (891, 23391), (1017, 20493), (1243, 16767), (1863, 11187), (2277, 9153), (2599, 8019), (2673, 7797), (3051, 6831), (3729, 5589)]