85105420

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{10939}}^1$

素因数の和:11337

約数の個数: 24

約数和(自身を含む): 179197200

約数和(自身を除く): 94091780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 10939, 21878, 43756, 54695, 109390, 218780, 4255271, 8510542, 17021084, 21276355, 42552710, 85105420]

約数ペア:

[(1, 85105420), (2, 42552710), (4, 21276355), (5, 17021084), (10, 8510542), (20, 4255271), (389, 218780), (778, 109390), (1556, 54695), (1945, 43756), (3890, 21878), (7780, 10939)]