20445201

素因数分解:

$3^2\times 7^3\times {\mathrm{37}}^1\times {\mathrm{179}}^1$

素因数の和:243

約数の個数: 48

約数和(自身を含む): 35568000

約数和(自身を除く): 15122799

約数列:

[1, 3, 7, 9, 21, 37, 49, 63, 111, 147, 179, 259, 333, 343, 441, 537, 777, 1029, 1253, 1611, 1813, 2331, 3087, 3759, 5439, 6623, 8771, 11277, 12691, 16317, 19869, 26313, 38073, 46361, 59607, 61397, 78939, 114219, 139083, 184191, 324527, 417249, 552573, 973581, 2271689, 2920743, 6815067, 20445201]

約数ペア:

[(1, 20445201), (3, 6815067), (7, 2920743), (9, 2271689), (21, 973581), (37, 552573), (49, 417249), (63, 324527), (111, 184191), (147, 139083), (179, 114219), (259, 78939), (333, 61397), (343, 59607), (441, 46361), (537, 38073), (777, 26313), (1029, 19869), (1253, 16317), (1611, 12691), (1813, 11277), (2331, 8771), (3087, 6623), (3759, 5439)]