640665984

素因数分解:

$2^7\times 3^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{431}}^1$

素因数の和:541

約数の個数: 192

約数和(自身を含む): 2009318400

約数和(自身を除く): 1368652416

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 49, 56, 64, 79, 84, 96, 98, 112, 128, 147, 158, 168, 192, 196, 224, 237, 294, 316, 336, 384, 392, 431, 448, 474, 553, 588, 632, 672, 784, 862, 896, 948, 1106, 1176, 1264, 1293, 1344, 1568, 1659, 1724, 1896, 2212, 2352, 2528, 2586, 2688, 3017, 3136, 3318, 3448, 3792, 3871, 4424, 4704, 5056, 5172, 6034, 6272, 6636, 6896, 7584, 7742, 8848, 9051, 9408, 10112, 10344, 11613, 12068, 13272, 13792, 15168, 15484, 17696, 18102, 18816, 20688, 21119, 23226, 24136, 26544, 27584, 30336, 30968, 34049, 35392, 36204, 41376, 42238, 46452, 48272, 53088, 55168, 61936, 63357, 68098, 70784, 72408, 82752, 84476, 92904, 96544, 102147, 106176, 123872, 126714, 136196, 144816, 165504, 168952, 185808, 193088, 204294, 212352, 238343, 247744, 253428, 272392, 289632, 337904, 371616, 386176, 408588, 476686, 495488, 506856, 544784, 579264, 675808, 715029, 743232, 817176, 953372, 1013712, 1089568, 1158528, 1351616, 1430058, 1486464, 1634352, 1668401, 1906744, 2027424, 2179136, 2703232, 2860116, 3268704, 3336802, 3813488, 4054848, 4358272, 5005203, 5720232, 6537408, 6673604, 7626976, 8109696, 10010406, 11440464, 13074816, 13347208, 15253952, 20020812, 22880928, 26694416, 30507904, 40041624, 45761856, 53388832, 80083248, 91523712, 106777664, 160166496, 213555328, 320332992, 640665984]

約数ペア:

[(1, 640665984), (2, 320332992), (3, 213555328), (4, 160166496), (6, 106777664), (7, 91523712), (8, 80083248), (12, 53388832), (14, 45761856), (16, 40041624), (21, 30507904), (24, 26694416), (28, 22880928), (32, 20020812), (42, 15253952), (48, 13347208), (49, 13074816), (56, 11440464), (64, 10010406), (79, 8109696), (84, 7626976), (96, 6673604), (98, 6537408), (112, 5720232), (128, 5005203), (147, 4358272), (158, 4054848), (168, 3813488), (192, 3336802), (196, 3268704), (224, 2860116), (237, 2703232), (294, 2179136), (316, 2027424), (336, 1906744), (384, 1668401), (392, 1634352), (431, 1486464), (448, 1430058), (474, 1351616), (553, 1158528), (588, 1089568), (632, 1013712), (672, 953372), (784, 817176), (862, 743232), (896, 715029), (948, 675808), (1106, 579264), (1176, 544784), (1264, 506856), (1293, 495488), (1344, 476686), (1568, 408588), (1659, 386176), (1724, 371616), (1896, 337904), (2212, 289632), (2352, 272392), (2528, 253428), (2586, 247744), (2688, 238343), (3017, 212352), (3136, 204294), (3318, 193088), (3448, 185808), (3792, 168952), (3871, 165504), (4424, 144816), (4704, 136196), (5056, 126714), (5172, 123872), (6034, 106176), (6272, 102147), (6636, 96544), (6896, 92904), (7584, 84476), (7742, 82752), (8848, 72408), (9051, 70784), (9408, 68098), (10112, 63357), (10344, 61936), (11613, 55168), (12068, 53088), (13272, 48272), (13792, 46452), (15168, 42238), (15484, 41376), (17696, 36204), (18102, 35392), (18816, 34049), (20688, 30968), (21119, 30336), (23226, 27584), (24136, 26544)]