640227840

素因数分解:

$2^9\times 3^1\times 5^1\times 7^1\times {\mathrm{11909}}^1$

素因数の和:11942

約数の個数: 160

約数和(自身を含む): 2339314560

約数和(自身を除く): 1699086720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 64, 70, 80, 84, 96, 105, 112, 120, 128, 140, 160, 168, 192, 210, 224, 240, 256, 280, 320, 336, 384, 420, 448, 480, 512, 560, 640, 672, 768, 840, 896, 960, 1120, 1280, 1344, 1536, 1680, 1792, 1920, 2240, 2560, 2688, 3360, 3584, 3840, 4480, 5376, 6720, 7680, 8960, 10752, 11909, 13440, 17920, 23818, 26880, 35727, 47636, 53760, 59545, 71454, 83363, 95272, 119090, 142908, 166726, 178635, 190544, 238180, 250089, 285816, 333452, 357270, 381088, 416815, 476360, 500178, 571632, 666904, 714540, 762176, 833630, 952720, 1000356, 1143264, 1250445, 1333808, 1429080, 1524352, 1667260, 1905440, 2000712, 2286528, 2500890, 2667616, 2858160, 3048704, 3334520, 3810880, 4001424, 4573056, 5001780, 5335232, 5716320, 6097408, 6669040, 7621760, 8002848, 9146112, 10003560, 10670464, 11432640, 13338080, 15243520, 16005696, 18292224, 20007120, 21340928, 22865280, 26676160, 30487040, 32011392, 40014240, 42681856, 45730560, 53352320, 64022784, 80028480, 91461120, 106704640, 128045568, 160056960, 213409280, 320113920, 640227840]

約数ペア:

[(1, 640227840), (2, 320113920), (3, 213409280), (4, 160056960), (5, 128045568), (6, 106704640), (7, 91461120), (8, 80028480), (10, 64022784), (12, 53352320), (14, 45730560), (15, 42681856), (16, 40014240), (20, 32011392), (21, 30487040), (24, 26676160), (28, 22865280), (30, 21340928), (32, 20007120), (35, 18292224), (40, 16005696), (42, 15243520), (48, 13338080), (56, 11432640), (60, 10670464), (64, 10003560), (70, 9146112), (80, 8002848), (84, 7621760), (96, 6669040), (105, 6097408), (112, 5716320), (120, 5335232), (128, 5001780), (140, 4573056), (160, 4001424), (168, 3810880), (192, 3334520), (210, 3048704), (224, 2858160), (240, 2667616), (256, 2500890), (280, 2286528), (320, 2000712), (336, 1905440), (384, 1667260), (420, 1524352), (448, 1429080), (480, 1333808), (512, 1250445), (560, 1143264), (640, 1000356), (672, 952720), (768, 833630), (840, 762176), (896, 714540), (960, 666904), (1120, 571632), (1280, 500178), (1344, 476360), (1536, 416815), (1680, 381088), (1792, 357270), (1920, 333452), (2240, 285816), (2560, 250089), (2688, 238180), (3360, 190544), (3584, 178635), (3840, 166726), (4480, 142908), (5376, 119090), (6720, 95272), (7680, 83363), (8960, 71454), (10752, 59545), (11909, 53760), (13440, 47636), (17920, 35727), (23818, 26880)]