21385540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8837}}^1$

素因数の和:8868

約数の個数: 36

約数和(自身を含む): 49369068

約数和(自身を除く): 27983528

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8837, 17674, 35348, 44185, 88370, 97207, 176740, 194414, 388828, 486035, 972070, 1069277, 1944140, 2138554, 4277108, 5346385, 10692770, 21385540]

約数ペア:

[(1, 21385540), (2, 10692770), (4, 5346385), (5, 4277108), (10, 2138554), (11, 1944140), (20, 1069277), (22, 972070), (44, 486035), (55, 388828), (110, 194414), (121, 176740), (220, 97207), (242, 88370), (484, 44185), (605, 35348), (1210, 17674), (2420, 8837)]