80801980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{2011}}^1$

素因数の和:2075

約数の個数: 72

約数和(自身を含む): 202302576

約数和(自身を除く): 121500596

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 49, 70, 82, 98, 140, 164, 196, 205, 245, 287, 410, 490, 574, 820, 980, 1148, 1435, 2009, 2011, 2870, 4018, 4022, 5740, 8036, 8044, 10045, 10055, 14077, 20090, 20110, 28154, 40180, 40220, 56308, 70385, 82451, 98539, 140770, 164902, 197078, 281540, 329804, 394156, 412255, 492695, 577157, 824510, 985390, 1154314, 1649020, 1970780, 2308628, 2885785, 4040099, 5771570, 8080198, 11543140, 16160396, 20200495, 40400990, 80801980]

約数ペア:

[(1, 80801980), (2, 40400990), (4, 20200495), (5, 16160396), (7, 11543140), (10, 8080198), (14, 5771570), (20, 4040099), (28, 2885785), (35, 2308628), (41, 1970780), (49, 1649020), (70, 1154314), (82, 985390), (98, 824510), (140, 577157), (164, 492695), (196, 412255), (205, 394156), (245, 329804), (287, 281540), (410, 197078), (490, 164902), (574, 140770), (820, 98539), (980, 82451), (1148, 70385), (1435, 56308), (2009, 40220), (2011, 40180), (2870, 28154), (4018, 20110), (4022, 20090), (5740, 14077), (8036, 10055), (8044, 10045)]