257491520

素因数分解:

$2^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{331}}^1$

素因数の和:389

約数の個数: 224

約数和(自身を含む): 765023616

約数和(自身を除く): 507532096

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 17, 20, 22, 26, 32, 34, 40, 44, 52, 55, 64, 65, 68, 80, 85, 88, 104, 110, 130, 136, 143, 160, 170, 176, 187, 208, 220, 221, 260, 272, 286, 320, 331, 340, 352, 374, 416, 440, 442, 520, 544, 572, 662, 680, 704, 715, 748, 832, 880, 884, 935, 1040, 1088, 1105, 1144, 1324, 1360, 1430, 1496, 1655, 1760, 1768, 1870, 2080, 2210, 2288, 2431, 2648, 2720, 2860, 2992, 3310, 3520, 3536, 3641, 3740, 4160, 4303, 4420, 4576, 4862, 5296, 5440, 5627, 5720, 5984, 6620, 7072, 7282, 7480, 8606, 8840, 9152, 9724, 10592, 11254, 11440, 11968, 12155, 13240, 14144, 14564, 14960, 17212, 17680, 18205, 19448, 21184, 21515, 22508, 22880, 24310, 26480, 28135, 29128, 29920, 34424, 35360, 36410, 38896, 43030, 45016, 45760, 47333, 48620, 52960, 56270, 58256, 59840, 61897, 68848, 70720, 72820, 73151, 77792, 86060, 90032, 94666, 97240, 105920, 112540, 116512, 123794, 137696, 145640, 146302, 155584, 172120, 180064, 189332, 194480, 225080, 233024, 236665, 247588, 275392, 291280, 292604, 309485, 344240, 360128, 365755, 378664, 388960, 450160, 473330, 495176, 582560, 585208, 618970, 688480, 731510, 757328, 777920, 804661, 900320, 946660, 990352, 1165120, 1170416, 1237940, 1376960, 1463020, 1514656, 1609322, 1800640, 1893320, 1980704, 2340832, 2475880, 2926040, 3029312, 3218644, 3786640, 3961408, 4023305, 4681664, 4951760, 5852080, 6437288, 7573280, 8046610, 9903520, 11704160, 12874576, 15146560, 16093220, 19807040, 23408320, 25749152, 32186440, 51498304, 64372880, 128745760, 257491520]

約数ペア:

[(1, 257491520), (2, 128745760), (4, 64372880), (5, 51498304), (8, 32186440), (10, 25749152), (11, 23408320), (13, 19807040), (16, 16093220), (17, 15146560), (20, 12874576), (22, 11704160), (26, 9903520), (32, 8046610), (34, 7573280), (40, 6437288), (44, 5852080), (52, 4951760), (55, 4681664), (64, 4023305), (65, 3961408), (68, 3786640), (80, 3218644), (85, 3029312), (88, 2926040), (104, 2475880), (110, 2340832), (130, 1980704), (136, 1893320), (143, 1800640), (160, 1609322), (170, 1514656), (176, 1463020), (187, 1376960), (208, 1237940), (220, 1170416), (221, 1165120), (260, 990352), (272, 946660), (286, 900320), (320, 804661), (331, 777920), (340, 757328), (352, 731510), (374, 688480), (416, 618970), (440, 585208), (442, 582560), (520, 495176), (544, 473330), (572, 450160), (662, 388960), (680, 378664), (704, 365755), (715, 360128), (748, 344240), (832, 309485), (880, 292604), (884, 291280), (935, 275392), (1040, 247588), (1088, 236665), (1105, 233024), (1144, 225080), (1324, 194480), (1360, 189332), (1430, 180064), (1496, 172120), (1655, 155584), (1760, 146302), (1768, 145640), (1870, 137696), (2080, 123794), (2210, 116512), (2288, 112540), (2431, 105920), (2648, 97240), (2720, 94666), (2860, 90032), (2992, 86060), (3310, 77792), (3520, 73151), (3536, 72820), (3641, 70720), (3740, 68848), (4160, 61897), (4303, 59840), (4420, 58256), (4576, 56270), (4862, 52960), (5296, 48620), (5440, 47333), (5627, 45760), (5720, 45016), (5984, 43030), (6620, 38896), (7072, 36410), (7282, 35360), (7480, 34424), (8606, 29920), (8840, 29128), (9152, 28135), (9724, 26480), (10592, 24310), (11254, 22880), (11440, 22508), (11968, 21515), (12155, 21184), (13240, 19448), (14144, 18205), (14564, 17680), (14960, 17212)]