256893280

素因数分解:

$2^5\times 5^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:218

約数の個数: 192

約数和(自身を含む): 735436800

約数和(自身を除く): 478543520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 49, 56, 62, 70, 80, 98, 112, 124, 140, 151, 155, 160, 196, 217, 224, 245, 248, 280, 302, 310, 343, 392, 434, 490, 496, 560, 604, 620, 686, 755, 784, 868, 980, 992, 1057, 1085, 1120, 1208, 1240, 1372, 1510, 1519, 1568, 1715, 1736, 1960, 2114, 2170, 2416, 2480, 2744, 3020, 3038, 3430, 3472, 3920, 4228, 4340, 4681, 4832, 4960, 5285, 5488, 6040, 6076, 6860, 6944, 7399, 7595, 7840, 8456, 8680, 9362, 10570, 10633, 10976, 12080, 12152, 13720, 14798, 15190, 16912, 17360, 18724, 21140, 21266, 23405, 24160, 24304, 27440, 29596, 30380, 32767, 33824, 34720, 36995, 37448, 42280, 42532, 46810, 48608, 51793, 53165, 54880, 59192, 60760, 65534, 73990, 74896, 84560, 85064, 93620, 103586, 106330, 118384, 121520, 131068, 147980, 149792, 163835, 169120, 170128, 187240, 207172, 212660, 229369, 236768, 243040, 258965, 262136, 295960, 327670, 340256, 374480, 414344, 425320, 458738, 517930, 524272, 591920, 655340, 748960, 828688, 850640, 917476, 1035860, 1048544, 1146845, 1183840, 1310680, 1605583, 1657376, 1701280, 1834952, 2071720, 2293690, 2621360, 3211166, 3669904, 4143440, 4587380, 5242720, 6422332, 7339808, 8027915, 8286880, 9174760, 12844664, 16055830, 18349520, 25689328, 32111660, 36699040, 51378656, 64223320, 128446640, 256893280]

約数ペア:

[(1, 256893280), (2, 128446640), (4, 64223320), (5, 51378656), (7, 36699040), (8, 32111660), (10, 25689328), (14, 18349520), (16, 16055830), (20, 12844664), (28, 9174760), (31, 8286880), (32, 8027915), (35, 7339808), (40, 6422332), (49, 5242720), (56, 4587380), (62, 4143440), (70, 3669904), (80, 3211166), (98, 2621360), (112, 2293690), (124, 2071720), (140, 1834952), (151, 1701280), (155, 1657376), (160, 1605583), (196, 1310680), (217, 1183840), (224, 1146845), (245, 1048544), (248, 1035860), (280, 917476), (302, 850640), (310, 828688), (343, 748960), (392, 655340), (434, 591920), (490, 524272), (496, 517930), (560, 458738), (604, 425320), (620, 414344), (686, 374480), (755, 340256), (784, 327670), (868, 295960), (980, 262136), (992, 258965), (1057, 243040), (1085, 236768), (1120, 229369), (1208, 212660), (1240, 207172), (1372, 187240), (1510, 170128), (1519, 169120), (1568, 163835), (1715, 149792), (1736, 147980), (1960, 131068), (2114, 121520), (2170, 118384), (2416, 106330), (2480, 103586), (2744, 93620), (3020, 85064), (3038, 84560), (3430, 74896), (3472, 73990), (3920, 65534), (4228, 60760), (4340, 59192), (4681, 54880), (4832, 53165), (4960, 51793), (5285, 48608), (5488, 46810), (6040, 42532), (6076, 42280), (6860, 37448), (6944, 36995), (7399, 34720), (7595, 33824), (7840, 32767), (8456, 30380), (8680, 29596), (9362, 27440), (10570, 24304), (10633, 24160), (10976, 23405), (12080, 21266), (12152, 21140), (13720, 18724), (14798, 17360), (15190, 16912)]