2009721820

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{258319}}^1$

素因数の和:258717

約数の個数: 24

約数和(自身を含む): 4231281600

約数和(自身を除く): 2221559780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 258319, 516638, 1033276, 1291595, 2583190, 5166380, 100486091, 200972182, 401944364, 502430455, 1004860910, 2009721820]

約数ペア:

[(1, 2009721820), (2, 1004860910), (4, 502430455), (5, 401944364), (10, 200972182), (20, 100486091), (389, 5166380), (778, 2583190), (1556, 1291595), (1945, 1033276), (3890, 516638), (7780, 258319)]