121212728

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:229

約数の個数: 128

約数和(自身を含む): 298045440

約数和(自身を除く): 176832712

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 31, 41, 52, 56, 62, 82, 91, 104, 124, 131, 164, 182, 217, 248, 262, 287, 328, 364, 403, 434, 524, 533, 574, 728, 806, 868, 917, 1048, 1066, 1148, 1271, 1612, 1703, 1736, 1834, 2132, 2296, 2542, 2821, 3224, 3406, 3668, 3731, 4061, 4264, 5084, 5371, 5642, 6812, 7336, 7462, 8122, 8897, 10168, 10742, 11284, 11921, 13624, 14924, 16244, 16523, 17794, 21484, 22568, 23842, 28427, 29848, 32488, 33046, 35588, 37597, 42968, 47684, 52793, 56854, 66092, 69823, 71176, 75194, 95368, 105586, 113708, 115661, 132184, 139646, 150388, 166501, 211172, 227416, 231322, 279292, 300776, 333002, 369551, 422344, 462644, 488761, 558584, 666004, 739102, 925288, 977522, 1165507, 1332008, 1478204, 1955044, 2164513, 2331014, 2956408, 3910088, 4329026, 4662028, 8658052, 9324056, 15151591, 17316104, 30303182, 60606364, 121212728]

約数ペア:

[(1, 121212728), (2, 60606364), (4, 30303182), (7, 17316104), (8, 15151591), (13, 9324056), (14, 8658052), (26, 4662028), (28, 4329026), (31, 3910088), (41, 2956408), (52, 2331014), (56, 2164513), (62, 1955044), (82, 1478204), (91, 1332008), (104, 1165507), (124, 977522), (131, 925288), (164, 739102), (182, 666004), (217, 558584), (248, 488761), (262, 462644), (287, 422344), (328, 369551), (364, 333002), (403, 300776), (434, 279292), (524, 231322), (533, 227416), (574, 211172), (728, 166501), (806, 150388), (868, 139646), (917, 132184), (1048, 115661), (1066, 113708), (1148, 105586), (1271, 95368), (1612, 75194), (1703, 71176), (1736, 69823), (1834, 66092), (2132, 56854), (2296, 52793), (2542, 47684), (2821, 42968), (3224, 37597), (3406, 35588), (3668, 33046), (3731, 32488), (4061, 29848), (4264, 28427), (5084, 23842), (5371, 22568), (5642, 21484), (6812, 17794), (7336, 16523), (7462, 16244), (8122, 14924), (8897, 13624), (10168, 11921), (10742, 11284)]