20988400

素因数分解:

$2^4\times 5^2\times {\mathrm{137}}^1\times {\mathrm{383}}^1$

素因数の和:538

約数の個数: 60

約数和(自身を含む): 50925312

約数和(自身を除く): 29936912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 137, 200, 274, 383, 400, 548, 685, 766, 1096, 1370, 1532, 1915, 2192, 2740, 3064, 3425, 3830, 5480, 6128, 6850, 7660, 9575, 10960, 13700, 15320, 19150, 27400, 30640, 38300, 52471, 54800, 76600, 104942, 153200, 209884, 262355, 419768, 524710, 839536, 1049420, 1311775, 2098840, 2623550, 4197680, 5247100, 10494200, 20988400]

約数ペア:

[(1, 20988400), (2, 10494200), (4, 5247100), (5, 4197680), (8, 2623550), (10, 2098840), (16, 1311775), (20, 1049420), (25, 839536), (40, 524710), (50, 419768), (80, 262355), (100, 209884), (137, 153200), (200, 104942), (274, 76600), (383, 54800), (400, 52471), (548, 38300), (685, 30640), (766, 27400), (1096, 19150), (1370, 15320), (1532, 13700), (1915, 10960), (2192, 9575), (2740, 7660), (3064, 6850), (3425, 6128), (3830, 5480)]