640799280

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{80909}}^1$

素因数の和:80939

約数の個数: 120

約数和(自身を含む): 2347684560

約数和(自身を除く): 1706885280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 48, 55, 60, 66, 72, 80, 88, 90, 99, 110, 120, 132, 144, 165, 176, 180, 198, 220, 240, 264, 330, 360, 396, 440, 495, 528, 660, 720, 792, 880, 990, 1320, 1584, 1980, 2640, 3960, 7920, 80909, 161818, 242727, 323636, 404545, 485454, 647272, 728181, 809090, 889999, 970908, 1213635, 1294544, 1456362, 1618180, 1779998, 1941816, 2427270, 2669997, 2912724, 3236360, 3559996, 3640905, 3883632, 4449995, 4854540, 5339994, 5825448, 6472720, 7119992, 7281810, 8009991, 8899990, 9709080, 10679988, 11650896, 13349985, 14239984, 14563620, 16019982, 17799980, 19418160, 21359976, 26699970, 29127240, 32039964, 35599960, 40049955, 42719952, 53399940, 58254480, 64079928, 71199920, 80099910, 106799880, 128159856, 160199820, 213599760, 320399640, 640799280]

約数ペア:

[(1, 640799280), (2, 320399640), (3, 213599760), (4, 160199820), (5, 128159856), (6, 106799880), (8, 80099910), (9, 71199920), (10, 64079928), (11, 58254480), (12, 53399940), (15, 42719952), (16, 40049955), (18, 35599960), (20, 32039964), (22, 29127240), (24, 26699970), (30, 21359976), (33, 19418160), (36, 17799980), (40, 16019982), (44, 14563620), (45, 14239984), (48, 13349985), (55, 11650896), (60, 10679988), (66, 9709080), (72, 8899990), (80, 8009991), (88, 7281810), (90, 7119992), (99, 6472720), (110, 5825448), (120, 5339994), (132, 4854540), (144, 4449995), (165, 3883632), (176, 3640905), (180, 3559996), (198, 3236360), (220, 2912724), (240, 2669997), (264, 2427270), (330, 1941816), (360, 1779998), (396, 1618180), (440, 1456362), (495, 1294544), (528, 1213635), (660, 970908), (720, 889999), (792, 809090), (880, 728181), (990, 647272), (1320, 485454), (1584, 404545), (1980, 323636), (2640, 242727), (3960, 161818), (7920, 80909)]