21005712

素因数分解:

$2^4\times 3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{229}}^1$

素因数の和:270

約数の個数: 180

約数和(自身を含む): 73966620

約数和(自身を除く): 52960908

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 13, 14, 16, 18, 21, 24, 26, 28, 36, 39, 42, 48, 49, 52, 56, 63, 72, 78, 84, 91, 98, 104, 112, 117, 126, 144, 147, 156, 168, 182, 196, 208, 229, 234, 252, 273, 294, 312, 336, 364, 392, 441, 458, 468, 504, 546, 588, 624, 637, 687, 728, 784, 819, 882, 916, 936, 1008, 1092, 1176, 1274, 1374, 1456, 1603, 1638, 1764, 1832, 1872, 1911, 2061, 2184, 2352, 2548, 2748, 2977, 3206, 3276, 3528, 3664, 3822, 4122, 4368, 4809, 5096, 5496, 5733, 5954, 6412, 6552, 7056, 7644, 8244, 8931, 9618, 10192, 10992, 11221, 11466, 11908, 12824, 13104, 14427, 15288, 16488, 17862, 19236, 20839, 22442, 22932, 23816, 25648, 26793, 28854, 30576, 32976, 33663, 35724, 38472, 41678, 44884, 45864, 47632, 53586, 57708, 62517, 67326, 71448, 76944, 83356, 89768, 91728, 100989, 107172, 115416, 125034, 134652, 142896, 145873, 166712, 179536, 187551, 201978, 214344, 230832, 250068, 269304, 291746, 333424, 375102, 403956, 428688, 437619, 500136, 538608, 583492, 750204, 807912, 875238, 1000272, 1166984, 1312857, 1500408, 1615824, 1750476, 2333968, 2625714, 3000816, 3500952, 5251428, 7001904, 10502856, 21005712]

約数ペア:

[(1, 21005712), (2, 10502856), (3, 7001904), (4, 5251428), (6, 3500952), (7, 3000816), (8, 2625714), (9, 2333968), (12, 1750476), (13, 1615824), (14, 1500408), (16, 1312857), (18, 1166984), (21, 1000272), (24, 875238), (26, 807912), (28, 750204), (36, 583492), (39, 538608), (42, 500136), (48, 437619), (49, 428688), (52, 403956), (56, 375102), (63, 333424), (72, 291746), (78, 269304), (84, 250068), (91, 230832), (98, 214344), (104, 201978), (112, 187551), (117, 179536), (126, 166712), (144, 145873), (147, 142896), (156, 134652), (168, 125034), (182, 115416), (196, 107172), (208, 100989), (229, 91728), (234, 89768), (252, 83356), (273, 76944), (294, 71448), (312, 67326), (336, 62517), (364, 57708), (392, 53586), (441, 47632), (458, 45864), (468, 44884), (504, 41678), (546, 38472), (588, 35724), (624, 33663), (637, 32976), (687, 30576), (728, 28854), (784, 26793), (819, 25648), (882, 23816), (916, 22932), (936, 22442), (1008, 20839), (1092, 19236), (1176, 17862), (1274, 16488), (1374, 15288), (1456, 14427), (1603, 13104), (1638, 12824), (1764, 11908), (1832, 11466), (1872, 11221), (1911, 10992), (2061, 10192), (2184, 9618), (2352, 8931), (2548, 8244), (2748, 7644), (2977, 7056), (3206, 6552), (3276, 6412), (3528, 5954), (3664, 5733), (3822, 5496), (4122, 5096), (4368, 4809)]