20909780

素因数分解:

$2^2\times 5^1\times {\mathrm{557}}^1\times {\mathrm{1877}}^1$

素因数の和:2443

約数の個数: 24

約数和(自身を含む): 44012808

約数和(自身を除く): 23103028

約数列:

[1, 2, 4, 5, 10, 20, 557, 1114, 1877, 2228, 2785, 3754, 5570, 7508, 9385, 11140, 18770, 37540, 1045489, 2090978, 4181956, 5227445, 10454890, 20909780]

約数ペア:

[(1, 20909780), (2, 10454890), (4, 5227445), (5, 4181956), (10, 2090978), (20, 1045489), (557, 37540), (1114, 18770), (1877, 11140), (2228, 9385), (2785, 7508), (3754, 5570)]