256439520

素因数分解:

$2^5\times 3^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{421}}^1$

素因数の和:495

約数の個数: 240

約数和(自身を含む): 926468928

約数和(自身を除く): 670029408

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 47, 48, 54, 60, 72, 80, 81, 90, 94, 96, 108, 120, 135, 141, 144, 160, 162, 180, 188, 216, 235, 240, 270, 282, 288, 324, 360, 376, 405, 421, 423, 432, 470, 480, 540, 564, 648, 705, 720, 752, 810, 842, 846, 864, 940, 1080, 1128, 1263, 1269, 1296, 1410, 1440, 1504, 1620, 1684, 1692, 1880, 2105, 2115, 2160, 2256, 2526, 2538, 2592, 2820, 3240, 3368, 3384, 3760, 3789, 3807, 4210, 4230, 4320, 4512, 5052, 5076, 5640, 6315, 6345, 6480, 6736, 6768, 7520, 7578, 7614, 8420, 8460, 10104, 10152, 11280, 11367, 12630, 12690, 12960, 13472, 13536, 15156, 15228, 16840, 16920, 18945, 19035, 19787, 20208, 20304, 22560, 22734, 25260, 25380, 30312, 30456, 33680, 33840, 34101, 37890, 38070, 39574, 40416, 40608, 45468, 50520, 50760, 56835, 59361, 60624, 60912, 67360, 67680, 68202, 75780, 76140, 79148, 90936, 98935, 101040, 101520, 113670, 118722, 121248, 121824, 136404, 151560, 152280, 158296, 170505, 178083, 181872, 197870, 202080, 203040, 227340, 237444, 272808, 296805, 303120, 304560, 316592, 341010, 356166, 363744, 395740, 454680, 474888, 534249, 545616, 593610, 606240, 609120, 633184, 682020, 712332, 791480, 890415, 909360, 949776, 1068498, 1091232, 1187220, 1364040, 1424664, 1582960, 1602747, 1780830, 1818720, 1899552, 2136996, 2374440, 2671245, 2728080, 2849328, 3165920, 3205494, 3561660, 4273992, 4748880, 5342490, 5456160, 5698656, 6410988, 7123320, 8013735, 8547984, 9497760, 10684980, 12821976, 14246640, 16027470, 17095968, 21369960, 25643952, 28493280, 32054940, 42739920, 51287904, 64109880, 85479840, 128219760, 256439520]

約数ペア:

[(1, 256439520), (2, 128219760), (3, 85479840), (4, 64109880), (5, 51287904), (6, 42739920), (8, 32054940), (9, 28493280), (10, 25643952), (12, 21369960), (15, 17095968), (16, 16027470), (18, 14246640), (20, 12821976), (24, 10684980), (27, 9497760), (30, 8547984), (32, 8013735), (36, 7123320), (40, 6410988), (45, 5698656), (47, 5456160), (48, 5342490), (54, 4748880), (60, 4273992), (72, 3561660), (80, 3205494), (81, 3165920), (90, 2849328), (94, 2728080), (96, 2671245), (108, 2374440), (120, 2136996), (135, 1899552), (141, 1818720), (144, 1780830), (160, 1602747), (162, 1582960), (180, 1424664), (188, 1364040), (216, 1187220), (235, 1091232), (240, 1068498), (270, 949776), (282, 909360), (288, 890415), (324, 791480), (360, 712332), (376, 682020), (405, 633184), (421, 609120), (423, 606240), (432, 593610), (470, 545616), (480, 534249), (540, 474888), (564, 454680), (648, 395740), (705, 363744), (720, 356166), (752, 341010), (810, 316592), (842, 304560), (846, 303120), (864, 296805), (940, 272808), (1080, 237444), (1128, 227340), (1263, 203040), (1269, 202080), (1296, 197870), (1410, 181872), (1440, 178083), (1504, 170505), (1620, 158296), (1684, 152280), (1692, 151560), (1880, 136404), (2105, 121824), (2115, 121248), (2160, 118722), (2256, 113670), (2526, 101520), (2538, 101040), (2592, 98935), (2820, 90936), (3240, 79148), (3368, 76140), (3384, 75780), (3760, 68202), (3789, 67680), (3807, 67360), (4210, 60912), (4230, 60624), (4320, 59361), (4512, 56835), (5052, 50760), (5076, 50520), (5640, 45468), (6315, 40608), (6345, 40416), (6480, 39574), (6736, 38070), (6768, 37890), (7520, 34101), (7578, 33840), (7614, 33680), (8420, 30456), (8460, 30312), (10104, 25380), (10152, 25260), (11280, 22734), (11367, 22560), (12630, 20304), (12690, 20208), (12960, 19787), (13472, 19035), (13536, 18945), (15156, 16920), (15228, 16840)]