20978800

素因数分解:

$2^4\times 5^2\times {\mathrm{179}}^1\times {\mathrm{293}}^1$

素因数の和:490

約数の個数: 60

約数和(自身を含む): 50856120

約数和(自身を除く): 29877320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 179, 200, 293, 358, 400, 586, 716, 895, 1172, 1432, 1465, 1790, 2344, 2864, 2930, 3580, 4475, 4688, 5860, 7160, 7325, 8950, 11720, 14320, 14650, 17900, 23440, 29300, 35800, 52447, 58600, 71600, 104894, 117200, 209788, 262235, 419576, 524470, 839152, 1048940, 1311175, 2097880, 2622350, 4195760, 5244700, 10489400, 20978800]

約数ペア:

[(1, 20978800), (2, 10489400), (4, 5244700), (5, 4195760), (8, 2622350), (10, 2097880), (16, 1311175), (20, 1048940), (25, 839152), (40, 524470), (50, 419576), (80, 262235), (100, 209788), (179, 117200), (200, 104894), (293, 71600), (358, 58600), (400, 52447), (586, 35800), (716, 29300), (895, 23440), (1172, 17900), (1432, 14650), (1465, 14320), (1790, 11720), (2344, 8950), (2864, 7325), (2930, 7160), (3580, 5860), (4475, 4688)]