81668720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3557}}^1$

素因数の和:3618

約数の個数: 80

約数和(自身を含む): 222360768

約数和(自身を除く): 140692048

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 41, 56, 70, 80, 82, 112, 140, 164, 205, 280, 287, 328, 410, 560, 574, 656, 820, 1148, 1435, 1640, 2296, 2870, 3280, 3557, 4592, 5740, 7114, 11480, 14228, 17785, 22960, 24899, 28456, 35570, 49798, 56912, 71140, 99596, 124495, 142280, 145837, 199192, 248990, 284560, 291674, 398384, 497980, 583348, 729185, 995960, 1020859, 1166696, 1458370, 1991920, 2041718, 2333392, 2916740, 4083436, 5104295, 5833480, 8166872, 10208590, 11666960, 16333744, 20417180, 40834360, 81668720]

約数ペア:

[(1, 81668720), (2, 40834360), (4, 20417180), (5, 16333744), (7, 11666960), (8, 10208590), (10, 8166872), (14, 5833480), (16, 5104295), (20, 4083436), (28, 2916740), (35, 2333392), (40, 2041718), (41, 1991920), (56, 1458370), (70, 1166696), (80, 1020859), (82, 995960), (112, 729185), (140, 583348), (164, 497980), (205, 398384), (280, 291674), (287, 284560), (328, 248990), (410, 199192), (560, 145837), (574, 142280), (656, 124495), (820, 99596), (1148, 71140), (1435, 56912), (1640, 49798), (2296, 35570), (2870, 28456), (3280, 24899), (3557, 22960), (4592, 17785), (5740, 14228), (7114, 11480)]