1977880

素因数分解:

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

素因数の和:459

約数の個数: 32

約数和(自身を含む): 4490640

約数和(自身を除く): 2512760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 251, 394, 502, 788, 985, 1004, 1255, 1576, 1970, 2008, 2510, 3940, 5020, 7880, 10040, 49447, 98894, 197788, 247235, 395576, 494470, 988940, 1977880]

約数ペア:

[(1, 1977880), (2, 988940), (4, 494470), (5, 395576), (8, 247235), (10, 197788), (20, 98894), (40, 49447), (197, 10040), (251, 7880), (394, 5020), (502, 3940), (788, 2510), (985, 2008), (1004, 1970), (1255, 1576)]