80681440

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{251}}^1$

素因数の和:321

約数の個数: 144

約数和(自身を含む): 228042864

約数和(自身を除く): 147361424

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 41, 49, 56, 70, 80, 82, 98, 112, 140, 160, 164, 196, 205, 224, 245, 251, 280, 287, 328, 392, 410, 490, 502, 560, 574, 656, 784, 820, 980, 1004, 1120, 1148, 1255, 1312, 1435, 1568, 1640, 1757, 1960, 2008, 2009, 2296, 2510, 2870, 3280, 3514, 3920, 4016, 4018, 4592, 5020, 5740, 6560, 7028, 7840, 8032, 8036, 8785, 9184, 10040, 10045, 10291, 11480, 12299, 14056, 16072, 17570, 20080, 20090, 20582, 22960, 24598, 28112, 32144, 35140, 40160, 40180, 41164, 45920, 49196, 51455, 56224, 61495, 64288, 70280, 72037, 80360, 82328, 98392, 102910, 122990, 140560, 144074, 160720, 164656, 196784, 205820, 245980, 281120, 288148, 321440, 329312, 360185, 393568, 411640, 491960, 504259, 576296, 720370, 823280, 983920, 1008518, 1152592, 1440740, 1646560, 1967840, 2017036, 2305184, 2521295, 2881480, 4034072, 5042590, 5762960, 8068144, 10085180, 11525920, 16136288, 20170360, 40340720, 80681440]

約数ペア:

[(1, 80681440), (2, 40340720), (4, 20170360), (5, 16136288), (7, 11525920), (8, 10085180), (10, 8068144), (14, 5762960), (16, 5042590), (20, 4034072), (28, 2881480), (32, 2521295), (35, 2305184), (40, 2017036), (41, 1967840), (49, 1646560), (56, 1440740), (70, 1152592), (80, 1008518), (82, 983920), (98, 823280), (112, 720370), (140, 576296), (160, 504259), (164, 491960), (196, 411640), (205, 393568), (224, 360185), (245, 329312), (251, 321440), (280, 288148), (287, 281120), (328, 245980), (392, 205820), (410, 196784), (490, 164656), (502, 160720), (560, 144074), (574, 140560), (656, 122990), (784, 102910), (820, 98392), (980, 82328), (1004, 80360), (1120, 72037), (1148, 70280), (1255, 64288), (1312, 61495), (1435, 56224), (1568, 51455), (1640, 49196), (1757, 45920), (1960, 41164), (2008, 40180), (2009, 40160), (2296, 35140), (2510, 32144), (2870, 28112), (3280, 24598), (3514, 22960), (3920, 20582), (4016, 20090), (4018, 20080), (4592, 17570), (5020, 16072), (5740, 14056), (6560, 12299), (7028, 11480), (7840, 10291), (8032, 10045), (8036, 10040), (8785, 9184)]