640307200

素因数分解:

$2^{12}\times 5^2\times {\mathrm{13}}^2\times {\mathrm{37}}^1$

素因数の和:97

約数の個数: 234

約数和(自身を含む): 1765766634

約数和(自身を除く): 1125459434

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 37, 40, 50, 52, 64, 65, 74, 80, 100, 104, 128, 130, 148, 160, 169, 185, 200, 208, 256, 260, 296, 320, 325, 338, 370, 400, 416, 481, 512, 520, 592, 640, 650, 676, 740, 800, 832, 845, 925, 962, 1024, 1040, 1184, 1280, 1300, 1352, 1480, 1600, 1664, 1690, 1850, 1924, 2048, 2080, 2368, 2405, 2560, 2600, 2704, 2960, 3200, 3328, 3380, 3700, 3848, 4096, 4160, 4225, 4736, 4810, 5120, 5200, 5408, 5920, 6253, 6400, 6656, 6760, 7400, 7696, 8320, 8450, 9472, 9620, 10240, 10400, 10816, 11840, 12025, 12506, 12800, 13312, 13520, 14800, 15392, 16640, 16900, 18944, 19240, 20480, 20800, 21632, 23680, 24050, 25012, 25600, 26624, 27040, 29600, 30784, 31265, 33280, 33800, 37888, 38480, 41600, 43264, 47360, 48100, 50024, 51200, 53248, 54080, 59200, 61568, 62530, 66560, 67600, 75776, 76960, 83200, 86528, 94720, 96200, 100048, 102400, 108160, 118400, 123136, 125060, 133120, 135200, 151552, 153920, 156325, 166400, 173056, 189440, 192400, 200096, 216320, 236800, 246272, 250120, 266240, 270400, 307840, 312650, 332800, 346112, 378880, 384800, 400192, 432640, 473600, 492544, 500240, 540800, 615680, 625300, 665600, 692224, 757760, 769600, 800384, 865280, 947200, 985088, 1000480, 1081600, 1231360, 1250600, 1331200, 1539200, 1600768, 1730560, 1894400, 1970176, 2000960, 2163200, 2462720, 2501200, 3078400, 3201536, 3461120, 3788800, 4001920, 4326400, 4925440, 5002400, 6156800, 6403072, 8003840, 8652800, 9850880, 10004800, 12313600, 12806144, 16007680, 17305600, 20009600, 24627200, 25612288, 32015360, 40019200, 49254400, 64030720, 80038400, 128061440, 160076800, 320153600, 640307200]

約数ペア:

[(1, 640307200), (2, 320153600), (4, 160076800), (5, 128061440), (8, 80038400), (10, 64030720), (13, 49254400), (16, 40019200), (20, 32015360), (25, 25612288), (26, 24627200), (32, 20009600), (37, 17305600), (40, 16007680), (50, 12806144), (52, 12313600), (64, 10004800), (65, 9850880), (74, 8652800), (80, 8003840), (100, 6403072), (104, 6156800), (128, 5002400), (130, 4925440), (148, 4326400), (160, 4001920), (169, 3788800), (185, 3461120), (200, 3201536), (208, 3078400), (256, 2501200), (260, 2462720), (296, 2163200), (320, 2000960), (325, 1970176), (338, 1894400), (370, 1730560), (400, 1600768), (416, 1539200), (481, 1331200), (512, 1250600), (520, 1231360), (592, 1081600), (640, 1000480), (650, 985088), (676, 947200), (740, 865280), (800, 800384), (832, 769600), (845, 757760), (925, 692224), (962, 665600), (1024, 625300), (1040, 615680), (1184, 540800), (1280, 500240), (1300, 492544), (1352, 473600), (1480, 432640), (1600, 400192), (1664, 384800), (1690, 378880), (1850, 346112), (1924, 332800), (2048, 312650), (2080, 307840), (2368, 270400), (2405, 266240), (2560, 250120), (2600, 246272), (2704, 236800), (2960, 216320), (3200, 200096), (3328, 192400), (3380, 189440), (3700, 173056), (3848, 166400), (4096, 156325), (4160, 153920), (4225, 151552), (4736, 135200), (4810, 133120), (5120, 125060), (5200, 123136), (5408, 118400), (5920, 108160), (6253, 102400), (6400, 100048), (6656, 96200), (6760, 94720), (7400, 86528), (7696, 83200), (8320, 76960), (8450, 75776), (9472, 67600), (9620, 66560), (10240, 62530), (10400, 61568), (10816, 59200), (11840, 54080), (12025, 53248), (12506, 51200), (12800, 50024), (13312, 48100), (13520, 47360), (14800, 43264), (15392, 41600), (16640, 38480), (16900, 37888), (18944, 33800), (19240, 33280), (20480, 31265), (20800, 30784), (21632, 29600), (23680, 27040), (24050, 26624), (25012, 25600)]