20724400

素因数分解:

$2^4\times 5^2\times {\mathrm{197}}^1\times {\mathrm{263}}^1$

素因数の和:478

約数の個数: 60

約数和(自身を含む): 50233392

約数和(自身を除く): 29508992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 197, 200, 263, 394, 400, 526, 788, 985, 1052, 1315, 1576, 1970, 2104, 2630, 3152, 3940, 4208, 4925, 5260, 6575, 7880, 9850, 10520, 13150, 15760, 19700, 21040, 26300, 39400, 51811, 52600, 78800, 103622, 105200, 207244, 259055, 414488, 518110, 828976, 1036220, 1295275, 2072440, 2590550, 4144880, 5181100, 10362200, 20724400]

約数ペア:

[(1, 20724400), (2, 10362200), (4, 5181100), (5, 4144880), (8, 2590550), (10, 2072440), (16, 1295275), (20, 1036220), (25, 828976), (40, 518110), (50, 414488), (80, 259055), (100, 207244), (197, 105200), (200, 103622), (263, 78800), (394, 52600), (400, 51811), (526, 39400), (788, 26300), (985, 21040), (1052, 19700), (1315, 15760), (1576, 13150), (1970, 10520), (2104, 9850), (2630, 7880), (3152, 6575), (3940, 5260), (4208, 4925)]