19958920

素因数分解:

$2^3\times 5^1\times {\mathrm{498973}}^1$

素因数の和:498984

約数の個数: 16

約数和(自身を含む): 44907660

約数和(自身を除く): 24948740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 498973, 997946, 1995892, 2494865, 3991784, 4989730, 9979460, 19958920]

約数ペア:

[(1, 19958920), (2, 9979460), (4, 4989730), (5, 3991784), (8, 2494865), (10, 1995892), (20, 997946), (40, 498973)]