19894490

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{3691}}^1$

素因数の和:3723

約数の個数: 48

約数和(自身を含む): 45455904

約数和(自身を除く): 25561414

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 49, 55, 70, 77, 98, 110, 154, 245, 385, 490, 539, 770, 1078, 2695, 3691, 5390, 7382, 18455, 25837, 36910, 40601, 51674, 81202, 129185, 180859, 203005, 258370, 284207, 361718, 406010, 568414, 904295, 1421035, 1808590, 1989449, 2842070, 3978898, 9947245, 19894490]

約数ペア:

[(1, 19894490), (2, 9947245), (5, 3978898), (7, 2842070), (10, 1989449), (11, 1808590), (14, 1421035), (22, 904295), (35, 568414), (49, 406010), (55, 361718), (70, 284207), (77, 258370), (98, 203005), (110, 180859), (154, 129185), (245, 81202), (385, 51674), (490, 40601), (539, 36910), (770, 25837), (1078, 18455), (2695, 7382), (3691, 5390)]