646399440

素因数分解:

$2^4\times 3^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{811}}^1$

素因数の和:880

約数の個数: 240

約数和(自身を含む): 2308977216

約数和(自身を除く): 1662577776

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 41, 45, 48, 54, 60, 72, 80, 81, 82, 90, 108, 120, 123, 135, 144, 162, 164, 180, 205, 216, 240, 243, 246, 270, 324, 328, 360, 369, 405, 410, 432, 486, 492, 540, 615, 648, 656, 720, 738, 810, 811, 820, 972, 984, 1080, 1107, 1215, 1230, 1296, 1476, 1620, 1622, 1640, 1845, 1944, 1968, 2160, 2214, 2430, 2433, 2460, 2952, 3240, 3244, 3280, 3321, 3690, 3888, 4055, 4428, 4860, 4866, 4920, 5535, 5904, 6480, 6488, 6642, 7299, 7380, 8110, 8856, 9720, 9732, 9840, 9963, 11070, 12165, 12976, 13284, 14598, 14760, 16220, 16605, 17712, 19440, 19464, 19926, 21897, 22140, 24330, 26568, 29196, 29520, 32440, 33210, 33251, 36495, 38928, 39852, 43794, 44280, 48660, 49815, 53136, 58392, 64880, 65691, 66420, 66502, 72990, 79704, 87588, 88560, 97320, 99630, 99753, 109485, 116784, 131382, 132840, 133004, 145980, 159408, 166255, 175176, 194640, 197073, 199260, 199506, 218970, 262764, 265680, 266008, 291960, 299259, 328455, 332510, 350352, 394146, 398520, 399012, 437940, 498765, 525528, 532016, 583920, 598518, 656910, 665020, 788292, 797040, 798024, 875880, 897777, 985365, 997530, 1051056, 1197036, 1313820, 1330040, 1496295, 1576584, 1596048, 1751760, 1795554, 1970730, 1995060, 2394072, 2627640, 2660080, 2693331, 2992590, 3153168, 3591108, 3941460, 3990120, 4488885, 4788144, 5255280, 5386662, 5985180, 7182216, 7882920, 7980240, 8079993, 8977770, 10773324, 11970360, 13466655, 14364432, 15765840, 16159986, 17955540, 21546648, 23940720, 26933310, 32319972, 35911080, 40399965, 43093296, 53866620, 64639944, 71822160, 80799930, 107733240, 129279888, 161599860, 215466480, 323199720, 646399440]

約数ペア:

[(1, 646399440), (2, 323199720), (3, 215466480), (4, 161599860), (5, 129279888), (6, 107733240), (8, 80799930), (9, 71822160), (10, 64639944), (12, 53866620), (15, 43093296), (16, 40399965), (18, 35911080), (20, 32319972), (24, 26933310), (27, 23940720), (30, 21546648), (36, 17955540), (40, 16159986), (41, 15765840), (45, 14364432), (48, 13466655), (54, 11970360), (60, 10773324), (72, 8977770), (80, 8079993), (81, 7980240), (82, 7882920), (90, 7182216), (108, 5985180), (120, 5386662), (123, 5255280), (135, 4788144), (144, 4488885), (162, 3990120), (164, 3941460), (180, 3591108), (205, 3153168), (216, 2992590), (240, 2693331), (243, 2660080), (246, 2627640), (270, 2394072), (324, 1995060), (328, 1970730), (360, 1795554), (369, 1751760), (405, 1596048), (410, 1576584), (432, 1496295), (486, 1330040), (492, 1313820), (540, 1197036), (615, 1051056), (648, 997530), (656, 985365), (720, 897777), (738, 875880), (810, 798024), (811, 797040), (820, 788292), (972, 665020), (984, 656910), (1080, 598518), (1107, 583920), (1215, 532016), (1230, 525528), (1296, 498765), (1476, 437940), (1620, 399012), (1622, 398520), (1640, 394146), (1845, 350352), (1944, 332510), (1968, 328455), (2160, 299259), (2214, 291960), (2430, 266008), (2433, 265680), (2460, 262764), (2952, 218970), (3240, 199506), (3244, 199260), (3280, 197073), (3321, 194640), (3690, 175176), (3888, 166255), (4055, 159408), (4428, 145980), (4860, 133004), (4866, 132840), (4920, 131382), (5535, 116784), (5904, 109485), (6480, 99753), (6488, 99630), (6642, 97320), (7299, 88560), (7380, 87588), (8110, 79704), (8856, 72990), (9720, 66502), (9732, 66420), (9840, 65691), (9963, 64880), (11070, 58392), (12165, 53136), (12976, 49815), (13284, 48660), (14598, 44280), (14760, 43794), (16220, 39852), (16605, 38928), (17712, 36495), (19440, 33251), (19464, 33210), (19926, 32440), (21897, 29520), (22140, 29196), (24330, 26568)]