81255680

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:260

約数の個数: 144

約数和(自身を含む): 220752000

約数和(自身を除く): 139496320

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 32, 40, 44, 55, 58, 64, 80, 88, 110, 116, 128, 145, 160, 176, 199, 220, 232, 256, 290, 319, 320, 352, 398, 440, 464, 580, 638, 640, 704, 796, 880, 928, 995, 1160, 1276, 1280, 1408, 1592, 1595, 1760, 1856, 1990, 2189, 2320, 2552, 2816, 3184, 3190, 3520, 3712, 3980, 4378, 4640, 5104, 5771, 6368, 6380, 7040, 7424, 7960, 8756, 9280, 10208, 10945, 11542, 12736, 12760, 14080, 15920, 17512, 18560, 20416, 21890, 23084, 25472, 25520, 28855, 31840, 35024, 37120, 40832, 43780, 46168, 50944, 51040, 57710, 63481, 63680, 70048, 81664, 87560, 92336, 102080, 115420, 126962, 127360, 140096, 175120, 184672, 204160, 230840, 253924, 254720, 280192, 317405, 350240, 369344, 408320, 461680, 507848, 560384, 634810, 700480, 738688, 923360, 1015696, 1269620, 1400960, 1477376, 1846720, 2031392, 2539240, 2801920, 3693440, 4062784, 5078480, 7386880, 8125568, 10156960, 16251136, 20313920, 40627840, 81255680]

約数ペア:

[(1, 81255680), (2, 40627840), (4, 20313920), (5, 16251136), (8, 10156960), (10, 8125568), (11, 7386880), (16, 5078480), (20, 4062784), (22, 3693440), (29, 2801920), (32, 2539240), (40, 2031392), (44, 1846720), (55, 1477376), (58, 1400960), (64, 1269620), (80, 1015696), (88, 923360), (110, 738688), (116, 700480), (128, 634810), (145, 560384), (160, 507848), (176, 461680), (199, 408320), (220, 369344), (232, 350240), (256, 317405), (290, 280192), (319, 254720), (320, 253924), (352, 230840), (398, 204160), (440, 184672), (464, 175120), (580, 140096), (638, 127360), (640, 126962), (704, 115420), (796, 102080), (880, 92336), (928, 87560), (995, 81664), (1160, 70048), (1276, 63680), (1280, 63481), (1408, 57710), (1592, 51040), (1595, 50944), (1760, 46168), (1856, 43780), (1990, 40832), (2189, 37120), (2320, 35024), (2552, 31840), (2816, 28855), (3184, 25520), (3190, 25472), (3520, 23084), (3712, 21890), (3980, 20416), (4378, 18560), (4640, 17512), (5104, 15920), (5771, 14080), (6368, 12760), (6380, 12736), (7040, 11542), (7424, 10945), (7960, 10208), (8756, 9280)]