858920

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{197}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 1960200

約数和(自身を除く): 1101280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 197, 218, 394, 436, 545, 788, 872, 985, 1090, 1576, 1970, 2180, 3940, 4360, 7880, 21473, 42946, 85892, 107365, 171784, 214730, 429460, 858920]

約数ペア:

[(1, 858920), (2, 429460), (4, 214730), (5, 171784), (8, 107365), (10, 85892), (20, 42946), (40, 21473), (109, 7880), (197, 4360), (218, 3940), (394, 2180), (436, 1970), (545, 1576), (788, 1090), (872, 985)]