640821664

素因数分解:

$2^5\times 7^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{521}}^1$

素因数の和:591

約数の個数: 144

約数和(自身を含む): 1615360320

約数和(自身を除く): 974538656

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 19, 28, 32, 34, 38, 56, 68, 76, 112, 119, 133, 136, 152, 224, 238, 266, 272, 289, 304, 323, 476, 521, 532, 544, 578, 608, 646, 952, 1042, 1064, 1156, 1292, 1904, 2023, 2084, 2128, 2261, 2312, 2584, 3647, 3808, 4046, 4168, 4256, 4522, 4624, 5168, 5491, 7294, 8092, 8336, 8857, 9044, 9248, 9899, 10336, 10982, 14588, 16184, 16672, 17714, 18088, 19798, 21964, 29176, 32368, 35428, 36176, 38437, 39596, 43928, 58352, 61999, 64736, 69293, 70856, 72352, 76874, 79192, 87856, 116704, 123998, 138586, 141712, 150569, 153748, 158384, 168283, 175712, 247996, 277172, 283424, 301138, 307496, 316768, 336566, 495992, 554344, 602276, 614992, 673132, 991984, 1053983, 1108688, 1177981, 1204552, 1229984, 1346264, 1983968, 2107966, 2217376, 2355962, 2409104, 2692528, 2860811, 4215932, 4711924, 4818208, 5385056, 5721622, 8431864, 9423848, 11443244, 16863728, 18847696, 20025677, 22886488, 33727456, 37695392, 40051354, 45772976, 80102708, 91545952, 160205416, 320410832, 640821664]

約数ペア:

[(1, 640821664), (2, 320410832), (4, 160205416), (7, 91545952), (8, 80102708), (14, 45772976), (16, 40051354), (17, 37695392), (19, 33727456), (28, 22886488), (32, 20025677), (34, 18847696), (38, 16863728), (56, 11443244), (68, 9423848), (76, 8431864), (112, 5721622), (119, 5385056), (133, 4818208), (136, 4711924), (152, 4215932), (224, 2860811), (238, 2692528), (266, 2409104), (272, 2355962), (289, 2217376), (304, 2107966), (323, 1983968), (476, 1346264), (521, 1229984), (532, 1204552), (544, 1177981), (578, 1108688), (608, 1053983), (646, 991984), (952, 673132), (1042, 614992), (1064, 602276), (1156, 554344), (1292, 495992), (1904, 336566), (2023, 316768), (2084, 307496), (2128, 301138), (2261, 283424), (2312, 277172), (2584, 247996), (3647, 175712), (3808, 168283), (4046, 158384), (4168, 153748), (4256, 150569), (4522, 141712), (4624, 138586), (5168, 123998), (5491, 116704), (7294, 87856), (8092, 79192), (8336, 76874), (8857, 72352), (9044, 70856), (9248, 69293), (9899, 64736), (10336, 61999), (10982, 58352), (14588, 43928), (16184, 39596), (16672, 38437), (17714, 36176), (18088, 35428), (19798, 32368), (21964, 29176)]