208355440

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{457}}^1$

素因数の和:650

約数の個数: 80

約数和(自身を含む): 500905440

約数和(自身を除く): 292550000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 139, 164, 205, 278, 328, 410, 457, 556, 656, 695, 820, 914, 1112, 1390, 1640, 1828, 2224, 2285, 2780, 3280, 3656, 4570, 5560, 5699, 7312, 9140, 11120, 11398, 18280, 18737, 22796, 28495, 36560, 37474, 45592, 56990, 63523, 74948, 91184, 93685, 113980, 127046, 149896, 187370, 227960, 254092, 299792, 317615, 374740, 455920, 508184, 635230, 749480, 1016368, 1270460, 1498960, 2540920, 2604443, 5081840, 5208886, 10417772, 13022215, 20835544, 26044430, 41671088, 52088860, 104177720, 208355440]

約数ペア:

[(1, 208355440), (2, 104177720), (4, 52088860), (5, 41671088), (8, 26044430), (10, 20835544), (16, 13022215), (20, 10417772), (40, 5208886), (41, 5081840), (80, 2604443), (82, 2540920), (139, 1498960), (164, 1270460), (205, 1016368), (278, 749480), (328, 635230), (410, 508184), (457, 455920), (556, 374740), (656, 317615), (695, 299792), (820, 254092), (914, 227960), (1112, 187370), (1390, 149896), (1640, 127046), (1828, 113980), (2224, 93685), (2285, 91184), (2780, 74948), (3280, 63523), (3656, 56990), (4570, 45592), (5560, 37474), (5699, 36560), (7312, 28495), (9140, 22796), (11120, 18737), (11398, 18280)]