640403456

素因数分解:

$2^{11}\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:202

約数の個数: 192

約数和(自身を含む): 1660538880

約数和(自身を除く): 1020135424

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 31, 32, 44, 56, 62, 64, 77, 88, 112, 124, 128, 131, 154, 176, 217, 224, 248, 256, 262, 308, 341, 352, 434, 448, 496, 512, 524, 616, 682, 704, 868, 896, 917, 992, 1024, 1048, 1232, 1364, 1408, 1441, 1736, 1792, 1834, 1984, 2048, 2096, 2387, 2464, 2728, 2816, 2882, 3472, 3584, 3668, 3968, 4061, 4192, 4774, 4928, 5456, 5632, 5764, 6944, 7168, 7336, 7936, 8122, 8384, 9548, 9856, 10087, 10912, 11264, 11528, 13888, 14336, 14672, 15872, 16244, 16768, 19096, 19712, 20174, 21824, 22528, 23056, 27776, 28427, 29344, 31744, 32488, 33536, 38192, 39424, 40348, 43648, 44671, 46112, 55552, 56854, 58688, 63488, 64976, 67072, 76384, 78848, 80696, 87296, 89342, 92224, 111104, 113708, 117376, 129952, 134144, 152768, 157696, 161392, 174592, 178684, 184448, 222208, 227416, 234752, 259904, 268288, 305536, 312697, 322784, 349184, 357368, 368896, 444416, 454832, 469504, 519808, 611072, 625394, 645568, 698368, 714736, 737792, 909664, 939008, 1039616, 1222144, 1250788, 1291136, 1429472, 1475584, 1819328, 1878016, 2079232, 2444288, 2501576, 2582272, 2858944, 2951168, 3638656, 4158464, 4888576, 5003152, 5164544, 5717888, 7277312, 8316928, 10006304, 10329088, 11435776, 14554624, 20012608, 20658176, 22871552, 29109248, 40025216, 45743104, 58218496, 80050432, 91486208, 160100864, 320201728, 640403456]

約数ペア:

[(1, 640403456), (2, 320201728), (4, 160100864), (7, 91486208), (8, 80050432), (11, 58218496), (14, 45743104), (16, 40025216), (22, 29109248), (28, 22871552), (31, 20658176), (32, 20012608), (44, 14554624), (56, 11435776), (62, 10329088), (64, 10006304), (77, 8316928), (88, 7277312), (112, 5717888), (124, 5164544), (128, 5003152), (131, 4888576), (154, 4158464), (176, 3638656), (217, 2951168), (224, 2858944), (248, 2582272), (256, 2501576), (262, 2444288), (308, 2079232), (341, 1878016), (352, 1819328), (434, 1475584), (448, 1429472), (496, 1291136), (512, 1250788), (524, 1222144), (616, 1039616), (682, 939008), (704, 909664), (868, 737792), (896, 714736), (917, 698368), (992, 645568), (1024, 625394), (1048, 611072), (1232, 519808), (1364, 469504), (1408, 454832), (1441, 444416), (1736, 368896), (1792, 357368), (1834, 349184), (1984, 322784), (2048, 312697), (2096, 305536), (2387, 268288), (2464, 259904), (2728, 234752), (2816, 227416), (2882, 222208), (3472, 184448), (3584, 178684), (3668, 174592), (3968, 161392), (4061, 157696), (4192, 152768), (4774, 134144), (4928, 129952), (5456, 117376), (5632, 113708), (5764, 111104), (6944, 92224), (7168, 89342), (7336, 87296), (7936, 80696), (8122, 78848), (8384, 76384), (9548, 67072), (9856, 64976), (10087, 63488), (10912, 58688), (11264, 56854), (11528, 55552), (13888, 46112), (14336, 44671), (14672, 43648), (15872, 40348), (16244, 39424), (16768, 38192), (19096, 33536), (19712, 32488), (20174, 31744), (21824, 29344), (22528, 28427), (23056, 27776)]