17808920

素因数分解:

$2^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1033}}^1$

素因数の和:1475

約数の個数: 32

約数和(自身を含む): 40201920

約数和(自身を除く): 22393000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 431, 862, 1033, 1724, 2066, 2155, 3448, 4132, 4310, 5165, 8264, 8620, 10330, 17240, 20660, 41320, 445223, 890446, 1780892, 2226115, 3561784, 4452230, 8904460, 17808920]

約数ペア:

[(1, 17808920), (2, 8904460), (4, 4452230), (5, 3561784), (8, 2226115), (10, 1780892), (20, 890446), (40, 445223), (431, 41320), (862, 20660), (1033, 17240), (1724, 10330), (2066, 8620), (2155, 8264), (3448, 5165), (4132, 4310)]