81438280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{193}}^1$

素因数の和:359

約数の個数: 128

約数和(自身を含む): 231310080

約数和(自身を除く): 149871800

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 137, 140, 154, 193, 220, 274, 280, 308, 385, 386, 440, 548, 616, 685, 770, 772, 959, 965, 1096, 1351, 1370, 1507, 1540, 1544, 1918, 1930, 2123, 2702, 2740, 3014, 3080, 3836, 3860, 4246, 4795, 5404, 5480, 6028, 6755, 7535, 7672, 7720, 8492, 9590, 10549, 10615, 10808, 12056, 13510, 14861, 15070, 16984, 19180, 21098, 21230, 26441, 27020, 29722, 30140, 38360, 42196, 42460, 52745, 52882, 54040, 59444, 60280, 74305, 84392, 84920, 105490, 105764, 118888, 132205, 148610, 185087, 210980, 211528, 264410, 290851, 297220, 370174, 421960, 528820, 581702, 594440, 740348, 925435, 1057640, 1163404, 1454255, 1480696, 1850870, 2035957, 2326808, 2908510, 3701740, 4071914, 5817020, 7403480, 8143828, 10179785, 11634040, 16287656, 20359570, 40719140, 81438280]

約数ペア:

[(1, 81438280), (2, 40719140), (4, 20359570), (5, 16287656), (7, 11634040), (8, 10179785), (10, 8143828), (11, 7403480), (14, 5817020), (20, 4071914), (22, 3701740), (28, 2908510), (35, 2326808), (40, 2035957), (44, 1850870), (55, 1480696), (56, 1454255), (70, 1163404), (77, 1057640), (88, 925435), (110, 740348), (137, 594440), (140, 581702), (154, 528820), (193, 421960), (220, 370174), (274, 297220), (280, 290851), (308, 264410), (385, 211528), (386, 210980), (440, 185087), (548, 148610), (616, 132205), (685, 118888), (770, 105764), (772, 105490), (959, 84920), (965, 84392), (1096, 74305), (1351, 60280), (1370, 59444), (1507, 54040), (1540, 52882), (1544, 52745), (1918, 42460), (1930, 42196), (2123, 38360), (2702, 30140), (2740, 29722), (3014, 27020), (3080, 26441), (3836, 21230), (3860, 21098), (4246, 19180), (4795, 16984), (5404, 15070), (5480, 14861), (6028, 13510), (6755, 12056), (7535, 10808), (7672, 10615), (7720, 10549), (8492, 9590)]