20939508

素因数分解:

$2^2\times 3^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{647}}^1$

素因数の和:717

約数の個数: 72

約数和(自身を含む): 56609280

約数和(自身を除く): 35669772

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 29, 31, 36, 58, 62, 87, 93, 116, 124, 174, 186, 261, 279, 348, 372, 522, 558, 647, 899, 1044, 1116, 1294, 1798, 1941, 2588, 2697, 3596, 3882, 5394, 5823, 7764, 8091, 10788, 11646, 16182, 18763, 20057, 23292, 32364, 37526, 40114, 56289, 60171, 75052, 80228, 112578, 120342, 168867, 180513, 225156, 240684, 337734, 361026, 581653, 675468, 722052, 1163306, 1744959, 2326612, 3489918, 5234877, 6979836, 10469754, 20939508]

約数ペア:

[(1, 20939508), (2, 10469754), (3, 6979836), (4, 5234877), (6, 3489918), (9, 2326612), (12, 1744959), (18, 1163306), (29, 722052), (31, 675468), (36, 581653), (58, 361026), (62, 337734), (87, 240684), (93, 225156), (116, 180513), (124, 168867), (174, 120342), (186, 112578), (261, 80228), (279, 75052), (348, 60171), (372, 56289), (522, 40114), (558, 37526), (647, 32364), (899, 23292), (1044, 20057), (1116, 18763), (1294, 16182), (1798, 11646), (1941, 10788), (2588, 8091), (2697, 7764), (3596, 5823), (3882, 5394)]