81129320

素因数分解:

$2^3\times 5^1\times {\mathrm{919}}^1\times {\mathrm{2207}}^1$

素因数の和:3137

約数の個数: 32

約数和(自身を含む): 182822400

約数和(自身を除く): 101693080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 919, 1838, 2207, 3676, 4414, 4595, 7352, 8828, 9190, 11035, 17656, 18380, 22070, 36760, 44140, 88280, 2028233, 4056466, 8112932, 10141165, 16225864, 20282330, 40564660, 81129320]

約数ペア:

[(1, 81129320), (2, 40564660), (4, 20282330), (5, 16225864), (8, 10141165), (10, 8112932), (20, 4056466), (40, 2028233), (919, 88280), (1838, 44140), (2207, 36760), (3676, 22070), (4414, 18380), (4595, 17656), (7352, 11035), (8828, 9190)]