19983680

素因数分解:

$2^6\times 5^1\times {\mathrm{197}}^1\times {\mathrm{317}}^1$

素因数の和:531

約数の個数: 56

約数和(自身を含む): 47978568

約数和(自身を除く): 27994888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 197, 317, 320, 394, 634, 788, 985, 1268, 1576, 1585, 1970, 2536, 3152, 3170, 3940, 5072, 6304, 6340, 7880, 10144, 12608, 12680, 15760, 20288, 25360, 31520, 50720, 62449, 63040, 101440, 124898, 249796, 312245, 499592, 624490, 999184, 1248980, 1998368, 2497960, 3996736, 4995920, 9991840, 19983680]

約数ペア:

[(1, 19983680), (2, 9991840), (4, 4995920), (5, 3996736), (8, 2497960), (10, 1998368), (16, 1248980), (20, 999184), (32, 624490), (40, 499592), (64, 312245), (80, 249796), (160, 124898), (197, 101440), (317, 63040), (320, 62449), (394, 50720), (634, 31520), (788, 25360), (985, 20288), (1268, 15760), (1576, 12680), (1585, 12608), (1970, 10144), (2536, 7880), (3152, 6340), (3170, 6304), (3940, 5072)]