257443840

素因数分解:

$2^{11}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{811}}^1$

素因数の和:869

約数の個数: 96

約数和(自身を含む): 638426880

約数和(自身を除く): 380983040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 811, 992, 1024, 1240, 1280, 1622, 1984, 2048, 2480, 2560, 3244, 3968, 4055, 4960, 5120, 6488, 7936, 8110, 9920, 10240, 12976, 15872, 16220, 19840, 25141, 25952, 31744, 32440, 39680, 50282, 51904, 63488, 64880, 79360, 100564, 103808, 125705, 129760, 158720, 201128, 207616, 251410, 259520, 317440, 402256, 415232, 502820, 519040, 804512, 830464, 1005640, 1038080, 1609024, 1660928, 2011280, 2076160, 3218048, 4022560, 4152320, 6436096, 8045120, 8304640, 12872192, 16090240, 25744384, 32180480, 51488768, 64360960, 128721920, 257443840]

約数ペア:

[(1, 257443840), (2, 128721920), (4, 64360960), (5, 51488768), (8, 32180480), (10, 25744384), (16, 16090240), (20, 12872192), (31, 8304640), (32, 8045120), (40, 6436096), (62, 4152320), (64, 4022560), (80, 3218048), (124, 2076160), (128, 2011280), (155, 1660928), (160, 1609024), (248, 1038080), (256, 1005640), (310, 830464), (320, 804512), (496, 519040), (512, 502820), (620, 415232), (640, 402256), (811, 317440), (992, 259520), (1024, 251410), (1240, 207616), (1280, 201128), (1622, 158720), (1984, 129760), (2048, 125705), (2480, 103808), (2560, 100564), (3244, 79360), (3968, 64880), (4055, 63488), (4960, 51904), (5120, 50282), (6488, 39680), (7936, 32440), (8110, 31744), (9920, 25952), (10240, 25141), (12976, 19840), (15872, 16220)]