20357980

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{5167}}^1$

素因数の和:5373

約数の個数: 24

約数和(自身を含む): 42977088

約数和(自身を除く): 22619108

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 5167, 10334, 20668, 25835, 51670, 103340, 1017899, 2035798, 4071596, 5089495, 10178990, 20357980]

約数ペア:

[(1, 20357980), (2, 10178990), (4, 5089495), (5, 4071596), (10, 2035798), (20, 1017899), (197, 103340), (394, 51670), (788, 25835), (985, 20668), (1970, 10334), (3940, 5167)]