82885780

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1\times {\mathrm{197}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 177463440

約数和(自身を除く): 94577660

約数列:

[1, 2, 4, 5, 10, 20, 109, 193, 197, 218, 386, 394, 436, 545, 772, 788, 965, 985, 1090, 1930, 1970, 2180, 3860, 3940, 21037, 21473, 38021, 42074, 42946, 76042, 84148, 85892, 105185, 107365, 152084, 190105, 210370, 214730, 380210, 420740, 429460, 760420, 4144289, 8288578, 16577156, 20721445, 41442890, 82885780]

約数ペア:

[(1, 82885780), (2, 41442890), (4, 20721445), (5, 16577156), (10, 8288578), (20, 4144289), (109, 760420), (193, 429460), (197, 420740), (218, 380210), (386, 214730), (394, 210370), (436, 190105), (545, 152084), (772, 107365), (788, 105185), (965, 85892), (985, 84148), (1090, 76042), (1930, 42946), (1970, 42074), (2180, 38021), (3860, 21473), (3940, 21037)]