18657639

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1$

素因数の和:165

約数の個数: 96

約数和(自身を含む): 38438400

約数和(自身を除く): 19780761

約数列:

[1, 3, 7, 9, 11, 13, 19, 21, 33, 39, 57, 63, 77, 91, 99, 109, 117, 133, 143, 171, 209, 231, 247, 273, 327, 399, 429, 627, 693, 741, 763, 819, 981, 1001, 1197, 1199, 1287, 1417, 1463, 1729, 1881, 2071, 2223, 2289, 2717, 3003, 3597, 4251, 4389, 5187, 6213, 6867, 8151, 8393, 9009, 9919, 10791, 12753, 13167, 14497, 15561, 15587, 18639, 19019, 22781, 24453, 25179, 26923, 29757, 43491, 46761, 57057, 68343, 75537, 80769, 89271, 109109, 130473, 140283, 159467, 171171, 188461, 205029, 242307, 296153, 327327, 478401, 565383, 888459, 981981, 1435203, 1696149, 2073071, 2665377, 6219213, 18657639]

約数ペア:

[(1, 18657639), (3, 6219213), (7, 2665377), (9, 2073071), (11, 1696149), (13, 1435203), (19, 981981), (21, 888459), (33, 565383), (39, 478401), (57, 327327), (63, 296153), (77, 242307), (91, 205029), (99, 188461), (109, 171171), (117, 159467), (133, 140283), (143, 130473), (171, 109109), (209, 89271), (231, 80769), (247, 75537), (273, 68343), (327, 57057), (399, 46761), (429, 43491), (627, 29757), (693, 26923), (741, 25179), (763, 24453), (819, 22781), (981, 19019), (1001, 18639), (1197, 15587), (1199, 15561), (1287, 14497), (1417, 13167), (1463, 12753), (1729, 10791), (1881, 9919), (2071, 9009), (2223, 8393), (2289, 8151), (2717, 6867), (3003, 6213), (3597, 5187), (4251, 4389)]