19899740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{463}}^1$

素因数の和:786

約数の個数: 48

約数和(自身を含む): 48018432

約数和(自身を除く): 28118692

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 307, 463, 614, 926, 1228, 1535, 1852, 2149, 2315, 3070, 3241, 4298, 4630, 6140, 6482, 8596, 9260, 10745, 12964, 16205, 21490, 32410, 42980, 64820, 142141, 284282, 568564, 710705, 994987, 1421410, 1989974, 2842820, 3979948, 4974935, 9949870, 19899740]

約数ペア:

[(1, 19899740), (2, 9949870), (4, 4974935), (5, 3979948), (7, 2842820), (10, 1989974), (14, 1421410), (20, 994987), (28, 710705), (35, 568564), (70, 284282), (140, 142141), (307, 64820), (463, 42980), (614, 32410), (926, 21490), (1228, 16205), (1535, 12964), (1852, 10745), (2149, 9260), (2315, 8596), (3070, 6482), (3241, 6140), (4298, 4630)]