256807040

素因数分解:

$2^7\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{431}}^1$

素因数の和:483

約数の個数: 192

約数和(自身を含む): 753494400

約数和(自身を除く): 496687360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 49, 56, 64, 70, 76, 80, 95, 98, 112, 128, 133, 140, 152, 160, 190, 196, 224, 245, 266, 280, 304, 320, 380, 392, 431, 448, 490, 532, 560, 608, 640, 665, 760, 784, 862, 896, 931, 980, 1064, 1120, 1216, 1330, 1520, 1568, 1724, 1862, 1960, 2128, 2155, 2240, 2432, 2660, 3017, 3040, 3136, 3448, 3724, 3920, 4256, 4310, 4480, 4655, 5320, 6034, 6080, 6272, 6896, 7448, 7840, 8189, 8512, 8620, 9310, 10640, 12068, 12160, 13792, 14896, 15085, 15680, 16378, 17024, 17240, 18620, 21119, 21280, 24136, 27584, 29792, 30170, 31360, 32756, 34480, 37240, 40945, 42238, 42560, 48272, 55168, 57323, 59584, 60340, 65512, 68960, 74480, 81890, 84476, 85120, 96544, 105595, 114646, 119168, 120680, 131024, 137920, 148960, 163780, 168952, 193088, 211190, 229292, 241360, 262048, 275840, 286615, 297920, 327560, 337904, 386176, 401261, 422380, 458584, 482720, 524096, 573230, 595840, 655120, 675808, 802522, 844760, 917168, 965440, 1048192, 1146460, 1310240, 1351616, 1605044, 1689520, 1834336, 1930880, 2006305, 2292920, 2620480, 2703232, 3210088, 3379040, 3668672, 4012610, 4585840, 5240960, 6420176, 6758080, 7337344, 8025220, 9171680, 12840352, 13516160, 16050440, 18343360, 25680704, 32100880, 36686720, 51361408, 64201760, 128403520, 256807040]

約数ペア:

[(1, 256807040), (2, 128403520), (4, 64201760), (5, 51361408), (7, 36686720), (8, 32100880), (10, 25680704), (14, 18343360), (16, 16050440), (19, 13516160), (20, 12840352), (28, 9171680), (32, 8025220), (35, 7337344), (38, 6758080), (40, 6420176), (49, 5240960), (56, 4585840), (64, 4012610), (70, 3668672), (76, 3379040), (80, 3210088), (95, 2703232), (98, 2620480), (112, 2292920), (128, 2006305), (133, 1930880), (140, 1834336), (152, 1689520), (160, 1605044), (190, 1351616), (196, 1310240), (224, 1146460), (245, 1048192), (266, 965440), (280, 917168), (304, 844760), (320, 802522), (380, 675808), (392, 655120), (431, 595840), (448, 573230), (490, 524096), (532, 482720), (560, 458584), (608, 422380), (640, 401261), (665, 386176), (760, 337904), (784, 327560), (862, 297920), (896, 286615), (931, 275840), (980, 262048), (1064, 241360), (1120, 229292), (1216, 211190), (1330, 193088), (1520, 168952), (1568, 163780), (1724, 148960), (1862, 137920), (1960, 131024), (2128, 120680), (2155, 119168), (2240, 114646), (2432, 105595), (2660, 96544), (3017, 85120), (3040, 84476), (3136, 81890), (3448, 74480), (3724, 68960), (3920, 65512), (4256, 60340), (4310, 59584), (4480, 57323), (4655, 55168), (5320, 48272), (6034, 42560), (6080, 42238), (6272, 40945), (6896, 37240), (7448, 34480), (7840, 32756), (8189, 31360), (8512, 30170), (8620, 29792), (9310, 27584), (10640, 24136), (12068, 21280), (12160, 21119), (13792, 18620), (14896, 17240), (15085, 17024), (15680, 16378)]