81915840

素因数分解:

$2^6\times 3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{499}}^1$

素因数の和:544

約数の個数: 224

約数和(自身を含む): 304800000

約数和(自身を除く): 222884160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 27, 30, 32, 36, 38, 40, 45, 48, 54, 57, 60, 64, 72, 76, 80, 90, 95, 96, 108, 114, 120, 135, 144, 152, 160, 171, 180, 190, 192, 216, 228, 240, 270, 285, 288, 304, 320, 342, 360, 380, 432, 456, 480, 499, 513, 540, 570, 576, 608, 684, 720, 760, 855, 864, 912, 960, 998, 1026, 1080, 1140, 1216, 1368, 1440, 1497, 1520, 1710, 1728, 1824, 1996, 2052, 2160, 2280, 2495, 2565, 2736, 2880, 2994, 3040, 3420, 3648, 3992, 4104, 4320, 4491, 4560, 4990, 5130, 5472, 5988, 6080, 6840, 7485, 7984, 8208, 8640, 8982, 9120, 9481, 9980, 10260, 10944, 11976, 13473, 13680, 14970, 15968, 16416, 17964, 18240, 18962, 19960, 20520, 22455, 23952, 26946, 27360, 28443, 29940, 31936, 32832, 35928, 37924, 39920, 41040, 44910, 47405, 47904, 53892, 54720, 56886, 59880, 67365, 71856, 75848, 79840, 82080, 85329, 89820, 94810, 95808, 107784, 113772, 119760, 134730, 142215, 143712, 151696, 159680, 164160, 170658, 179640, 189620, 215568, 227544, 239520, 255987, 269460, 284430, 287424, 303392, 341316, 359280, 379240, 426645, 431136, 455088, 479040, 511974, 538920, 568860, 606784, 682632, 718560, 758480, 853290, 862272, 910176, 1023948, 1077840, 1137720, 1279935, 1365264, 1437120, 1516960, 1706580, 1820352, 2047896, 2155680, 2275440, 2559870, 2730528, 3033920, 3413160, 4095792, 4311360, 4550880, 5119740, 5461056, 6826320, 8191584, 9101760, 10239480, 13652640, 16383168, 20478960, 27305280, 40957920, 81915840]

約数ペア:

[(1, 81915840), (2, 40957920), (3, 27305280), (4, 20478960), (5, 16383168), (6, 13652640), (8, 10239480), (9, 9101760), (10, 8191584), (12, 6826320), (15, 5461056), (16, 5119740), (18, 4550880), (19, 4311360), (20, 4095792), (24, 3413160), (27, 3033920), (30, 2730528), (32, 2559870), (36, 2275440), (38, 2155680), (40, 2047896), (45, 1820352), (48, 1706580), (54, 1516960), (57, 1437120), (60, 1365264), (64, 1279935), (72, 1137720), (76, 1077840), (80, 1023948), (90, 910176), (95, 862272), (96, 853290), (108, 758480), (114, 718560), (120, 682632), (135, 606784), (144, 568860), (152, 538920), (160, 511974), (171, 479040), (180, 455088), (190, 431136), (192, 426645), (216, 379240), (228, 359280), (240, 341316), (270, 303392), (285, 287424), (288, 284430), (304, 269460), (320, 255987), (342, 239520), (360, 227544), (380, 215568), (432, 189620), (456, 179640), (480, 170658), (499, 164160), (513, 159680), (540, 151696), (570, 143712), (576, 142215), (608, 134730), (684, 119760), (720, 113772), (760, 107784), (855, 95808), (864, 94810), (912, 89820), (960, 85329), (998, 82080), (1026, 79840), (1080, 75848), (1140, 71856), (1216, 67365), (1368, 59880), (1440, 56886), (1497, 54720), (1520, 53892), (1710, 47904), (1728, 47405), (1824, 44910), (1996, 41040), (2052, 39920), (2160, 37924), (2280, 35928), (2495, 32832), (2565, 31936), (2736, 29940), (2880, 28443), (2994, 27360), (3040, 26946), (3420, 23952), (3648, 22455), (3992, 20520), (4104, 19960), (4320, 18962), (4491, 18240), (4560, 17964), (4990, 16416), (5130, 15968), (5472, 14970), (5988, 13680), (6080, 13473), (6840, 11976), (7485, 10944), (7984, 10260), (8208, 9980), (8640, 9481), (8982, 9120)]