9991840

素因数分解:

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

素因数の和:529

約数の個数: 48

約数和(自身を含む): 23800392

約数和(自身を除く): 13808552

約数列:

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

約数ペア:

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