640756480

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5501}}^1$

素因数の和:5542

約数の個数: 144

約数和(自身を含む): 1889342784

約数和(自身を除く): 1248586304

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 64, 65, 70, 80, 91, 104, 112, 128, 130, 140, 160, 182, 208, 224, 256, 260, 280, 320, 364, 416, 448, 455, 520, 560, 640, 728, 832, 896, 910, 1040, 1120, 1280, 1456, 1664, 1792, 1820, 2080, 2240, 2912, 3328, 3640, 4160, 4480, 5501, 5824, 7280, 8320, 8960, 11002, 11648, 14560, 16640, 22004, 23296, 27505, 29120, 38507, 44008, 55010, 58240, 71513, 77014, 88016, 110020, 116480, 143026, 154028, 176032, 192535, 220040, 286052, 308056, 352064, 357565, 385070, 440080, 500591, 572104, 616112, 704128, 715130, 770140, 880160, 1001182, 1144208, 1232224, 1408256, 1430260, 1540280, 1760320, 2002364, 2288416, 2464448, 2502955, 2860520, 3080560, 3520640, 4004728, 4576832, 4928896, 5005910, 5721040, 6161120, 7041280, 8009456, 9153664, 9857792, 10011820, 11442080, 12322240, 16018912, 18307328, 20023640, 22884160, 24644480, 32037824, 40047280, 45768320, 49288960, 64075648, 80094560, 91536640, 128151296, 160189120, 320378240, 640756480]

約数ペア:

[(1, 640756480), (2, 320378240), (4, 160189120), (5, 128151296), (7, 91536640), (8, 80094560), (10, 64075648), (13, 49288960), (14, 45768320), (16, 40047280), (20, 32037824), (26, 24644480), (28, 22884160), (32, 20023640), (35, 18307328), (40, 16018912), (52, 12322240), (56, 11442080), (64, 10011820), (65, 9857792), (70, 9153664), (80, 8009456), (91, 7041280), (104, 6161120), (112, 5721040), (128, 5005910), (130, 4928896), (140, 4576832), (160, 4004728), (182, 3520640), (208, 3080560), (224, 2860520), (256, 2502955), (260, 2464448), (280, 2288416), (320, 2002364), (364, 1760320), (416, 1540280), (448, 1430260), (455, 1408256), (520, 1232224), (560, 1144208), (640, 1001182), (728, 880160), (832, 770140), (896, 715130), (910, 704128), (1040, 616112), (1120, 572104), (1280, 500591), (1456, 440080), (1664, 385070), (1792, 357565), (1820, 352064), (2080, 308056), (2240, 286052), (2912, 220040), (3328, 192535), (3640, 176032), (4160, 154028), (4480, 143026), (5501, 116480), (5824, 110020), (7280, 88016), (8320, 77014), (8960, 71513), (11002, 58240), (11648, 55010), (14560, 44008), (16640, 38507), (22004, 29120), (23296, 27505)]