205817840

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1\times {\mathrm{211}}^1$

素因数の和:450

約数の個数: 80

約数和(自身を含む): 489745440

約数和(自身を除く): 283927600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 137, 178, 211, 274, 356, 422, 445, 548, 685, 712, 844, 890, 1055, 1096, 1370, 1424, 1688, 1780, 2110, 2192, 2740, 3376, 3560, 4220, 5480, 7120, 8440, 10960, 12193, 16880, 18779, 24386, 28907, 37558, 48772, 57814, 60965, 75116, 93895, 97544, 115628, 121930, 144535, 150232, 187790, 195088, 231256, 243860, 289070, 300464, 375580, 462512, 487720, 578140, 751160, 975440, 1156280, 1502320, 2312560, 2572723, 5145446, 10290892, 12863615, 20581784, 25727230, 41163568, 51454460, 102908920, 205817840]

約数ペア:

[(1, 205817840), (2, 102908920), (4, 51454460), (5, 41163568), (8, 25727230), (10, 20581784), (16, 12863615), (20, 10290892), (40, 5145446), (80, 2572723), (89, 2312560), (137, 1502320), (178, 1156280), (211, 975440), (274, 751160), (356, 578140), (422, 487720), (445, 462512), (548, 375580), (685, 300464), (712, 289070), (844, 243860), (890, 231256), (1055, 195088), (1096, 187790), (1370, 150232), (1424, 144535), (1688, 121930), (1780, 115628), (2110, 97544), (2192, 93895), (2740, 75116), (3376, 60965), (3560, 57814), (4220, 48772), (5480, 37558), (7120, 28907), (8440, 24386), (10960, 18779), (12193, 16880)]