19891795

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^3\times {\mathrm{61}}^1$

素因数の和:113

約数の個数: 48

約数和(自身を含む): 31042656

約数和(自身を除く): 11150861

約数列:

[1, 5, 7, 11, 35, 49, 55, 61, 77, 121, 245, 305, 385, 427, 539, 605, 671, 847, 1331, 2135, 2695, 2989, 3355, 4235, 4697, 5929, 6655, 7381, 9317, 14945, 23485, 29645, 32879, 36905, 46585, 51667, 65219, 81191, 164395, 258335, 326095, 361669, 405955, 568337, 1808345, 2841685, 3978359, 19891795]

約数ペア:

[(1, 19891795), (5, 3978359), (7, 2841685), (11, 1808345), (35, 568337), (49, 405955), (55, 361669), (61, 326095), (77, 258335), (121, 164395), (245, 81191), (305, 65219), (385, 51667), (427, 46585), (539, 36905), (605, 32879), (671, 29645), (847, 23485), (1331, 14945), (2135, 9317), (2695, 7381), (2989, 6655), (3355, 5929), (4235, 4697)]