20465487

素因数分解:

$3^3\times 7^2\times {\mathrm{31}}^1\times {\mathrm{499}}^1$

素因数の和:553

約数の個数: 48

約数和(自身を含む): 36480000

約数和(自身を除く): 16014513

約数列:

[1, 3, 7, 9, 21, 27, 31, 49, 63, 93, 147, 189, 217, 279, 441, 499, 651, 837, 1323, 1497, 1519, 1953, 3493, 4491, 4557, 5859, 10479, 13473, 13671, 15469, 24451, 31437, 41013, 46407, 73353, 94311, 108283, 139221, 220059, 324849, 417663, 660177, 757981, 974547, 2273943, 2923641, 6821829, 20465487]

約数ペア:

[(1, 20465487), (3, 6821829), (7, 2923641), (9, 2273943), (21, 974547), (27, 757981), (31, 660177), (49, 417663), (63, 324849), (93, 220059), (147, 139221), (189, 108283), (217, 94311), (279, 73353), (441, 46407), (499, 41013), (651, 31437), (837, 24451), (1323, 15469), (1497, 13671), (1519, 13473), (1953, 10479), (3493, 5859), (4491, 4557)]