19848560

素因数分解:

$2^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{1811}}^1$

素因数の和:1961

約数の個数: 40

約数和(自身を含む): 46510416

約数和(自身を除く): 26661856

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 137, 274, 548, 685, 1096, 1370, 1811, 2192, 2740, 3622, 5480, 7244, 9055, 10960, 14488, 18110, 28976, 36220, 72440, 144880, 248107, 496214, 992428, 1240535, 1984856, 2481070, 3969712, 4962140, 9924280, 19848560]

約数ペア:

[(1, 19848560), (2, 9924280), (4, 4962140), (5, 3969712), (8, 2481070), (10, 1984856), (16, 1240535), (20, 992428), (40, 496214), (80, 248107), (137, 144880), (274, 72440), (548, 36220), (685, 28976), (1096, 18110), (1370, 14488), (1811, 10960), (2192, 9055), (2740, 7244), (3622, 5480)]