81406668

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{97}}^2\times {\mathrm{103}}^1$

素因数の和:311

約数の個数: 72

約数和(自身を含む): 221475072

約数和(自身を除く): 140068404

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 97, 103, 194, 206, 291, 309, 388, 412, 582, 618, 679, 721, 1164, 1236, 1358, 1442, 2037, 2163, 2716, 2884, 4074, 4326, 8148, 8652, 9409, 9991, 18818, 19982, 28227, 29973, 37636, 39964, 56454, 59946, 65863, 69937, 112908, 119892, 131726, 139874, 197589, 209811, 263452, 279748, 395178, 419622, 790356, 839244, 969127, 1938254, 2907381, 3876508, 5814762, 6783889, 11629524, 13567778, 20351667, 27135556, 40703334, 81406668]

約数ペア:

[(1, 81406668), (2, 40703334), (3, 27135556), (4, 20351667), (6, 13567778), (7, 11629524), (12, 6783889), (14, 5814762), (21, 3876508), (28, 2907381), (42, 1938254), (84, 969127), (97, 839244), (103, 790356), (194, 419622), (206, 395178), (291, 279748), (309, 263452), (388, 209811), (412, 197589), (582, 139874), (618, 131726), (679, 119892), (721, 112908), (1164, 69937), (1236, 65863), (1358, 59946), (1442, 56454), (2037, 39964), (2163, 37636), (2716, 29973), (2884, 28227), (4074, 19982), (4326, 18818), (8148, 9991), (8652, 9409)]