400004080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{3701}}^1$

素因数の和:3914

約数の個数: 80

約数和(自身を含む): 1068663744

約数和(自身を除く): 668659664

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 193, 280, 386, 560, 772, 965, 1351, 1544, 1930, 2702, 3088, 3701, 3860, 5404, 6755, 7402, 7720, 10808, 13510, 14804, 15440, 18505, 21616, 25907, 27020, 29608, 37010, 51814, 54040, 59216, 74020, 103628, 108080, 129535, 148040, 207256, 259070, 296080, 414512, 518140, 714293, 1036280, 1428586, 2072560, 2857172, 3571465, 5000051, 5714344, 7142930, 10000102, 11428688, 14285860, 20000204, 25000255, 28571720, 40000408, 50000510, 57143440, 80000816, 100001020, 200002040, 400004080]

約数ペア:

[(1, 400004080), (2, 200002040), (4, 100001020), (5, 80000816), (7, 57143440), (8, 50000510), (10, 40000408), (14, 28571720), (16, 25000255), (20, 20000204), (28, 14285860), (35, 11428688), (40, 10000102), (56, 7142930), (70, 5714344), (80, 5000051), (112, 3571465), (140, 2857172), (193, 2072560), (280, 1428586), (386, 1036280), (560, 714293), (772, 518140), (965, 414512), (1351, 296080), (1544, 259070), (1930, 207256), (2702, 148040), (3088, 129535), (3701, 108080), (3860, 103628), (5404, 74020), (6755, 59216), (7402, 54040), (7720, 51814), (10808, 37010), (13510, 29608), (14804, 27020), (15440, 25907), (18505, 21616)]