9889400

素因数分解:

$2^3\times 5^2\times {\mathrm{197}}^1\times {\mathrm{251}}^1$

素因数の和:464

約数の個数: 48

約数和(自身を含む): 23201640

約数和(自身を除く): 13312240

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 197, 200, 251, 394, 502, 788, 985, 1004, 1255, 1576, 1970, 2008, 2510, 3940, 4925, 5020, 6275, 7880, 9850, 10040, 12550, 19700, 25100, 39400, 49447, 50200, 98894, 197788, 247235, 395576, 494470, 988940, 1236175, 1977880, 2472350, 4944700, 9889400]

約数ペア:

[(1, 9889400), (2, 4944700), (4, 2472350), (5, 1977880), (8, 1236175), (10, 988940), (20, 494470), (25, 395576), (40, 247235), (50, 197788), (100, 98894), (197, 50200), (200, 49447), (251, 39400), (394, 25100), (502, 19700), (788, 12550), (985, 10040), (1004, 9850), (1255, 7880), (1576, 6275), (1970, 5020), (2008, 4925), (2510, 3940)]