18678964

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{739}}^1$

素因数の和:903

約数の個数: 24

約数和(自身を含む): 33566400

約数和(自身を除く): 14887436

約数列:

[1, 2, 4, 71, 89, 142, 178, 284, 356, 739, 1478, 2956, 6319, 12638, 25276, 52469, 65771, 104938, 131542, 209876, 263084, 4669741, 9339482, 18678964]

約数ペア:

[(1, 18678964), (2, 9339482), (4, 4669741), (71, 263084), (89, 209876), (142, 131542), (178, 104938), (284, 65771), (356, 52469), (739, 25276), (1478, 12638), (2956, 6319)]