220990

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1$

素因数の和:73

約数の個数: 48

約数和(自身を含む): 517104

約数和(自身を除く): 296114

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 41, 49, 55, 70, 77, 82, 98, 110, 154, 205, 245, 287, 385, 410, 451, 490, 539, 574, 770, 902, 1078, 1435, 2009, 2255, 2695, 2870, 3157, 4018, 4510, 5390, 6314, 10045, 15785, 20090, 22099, 31570, 44198, 110495, 220990]

約数ペア:

[(1, 220990), (2, 110495), (5, 44198), (7, 31570), (10, 22099), (11, 20090), (14, 15785), (22, 10045), (35, 6314), (41, 5390), (49, 4510), (55, 4018), (70, 3157), (77, 2870), (82, 2695), (98, 2255), (110, 2009), (154, 1435), (205, 1078), (245, 902), (287, 770), (385, 574), (410, 539), (451, 490)]