321777920

素因数分解:

$2^8\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1$

素因数の和:272

約数の個数: 144

約数和(自身を含む): 825612480

約数和(自身を除く): 503834560

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 101, 128, 131, 152, 160, 190, 202, 256, 262, 304, 320, 380, 404, 505, 524, 608, 640, 655, 760, 808, 1010, 1048, 1216, 1280, 1310, 1520, 1616, 1919, 2020, 2096, 2432, 2489, 2620, 3040, 3232, 3838, 4040, 4192, 4864, 4978, 5240, 6080, 6464, 7676, 8080, 8384, 9595, 9956, 10480, 12160, 12445, 12928, 13231, 15352, 16160, 16768, 19190, 19912, 20960, 24320, 24890, 25856, 26462, 30704, 32320, 33536, 38380, 39824, 41920, 49780, 52924, 61408, 64640, 66155, 76760, 79648, 83840, 99560, 105848, 122816, 129280, 132310, 153520, 159296, 167680, 199120, 211696, 245632, 251389, 264620, 307040, 318592, 398240, 423392, 491264, 502778, 529240, 614080, 637184, 796480, 846784, 1005556, 1058480, 1228160, 1256945, 1592960, 1693568, 2011112, 2116960, 2456320, 2513890, 3185920, 3387136, 4022224, 4233920, 5027780, 8044448, 8467840, 10055560, 16088896, 16935680, 20111120, 32177792, 40222240, 64355584, 80444480, 160888960, 321777920]

約数ペア:

[(1, 321777920), (2, 160888960), (4, 80444480), (5, 64355584), (8, 40222240), (10, 32177792), (16, 20111120), (19, 16935680), (20, 16088896), (32, 10055560), (38, 8467840), (40, 8044448), (64, 5027780), (76, 4233920), (80, 4022224), (95, 3387136), (101, 3185920), (128, 2513890), (131, 2456320), (152, 2116960), (160, 2011112), (190, 1693568), (202, 1592960), (256, 1256945), (262, 1228160), (304, 1058480), (320, 1005556), (380, 846784), (404, 796480), (505, 637184), (524, 614080), (608, 529240), (640, 502778), (655, 491264), (760, 423392), (808, 398240), (1010, 318592), (1048, 307040), (1216, 264620), (1280, 251389), (1310, 245632), (1520, 211696), (1616, 199120), (1919, 167680), (2020, 159296), (2096, 153520), (2432, 132310), (2489, 129280), (2620, 122816), (3040, 105848), (3232, 99560), (3838, 83840), (4040, 79648), (4192, 76760), (4864, 66155), (4978, 64640), (5240, 61408), (6080, 52924), (6464, 49780), (7676, 41920), (8080, 39824), (8384, 38380), (9595, 33536), (9956, 32320), (10480, 30704), (12160, 26462), (12445, 25856), (12928, 24890), (13231, 24320), (15352, 20960), (16160, 19912), (16768, 19190)]