865793540

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{397153}}^1$

素因数の和:397271

約数の個数: 24

約数和(自身を含む): 1834851480

約数和(自身を除く): 969057940

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 397153, 794306, 1588612, 1985765, 3971530, 7943060, 43289677, 86579354, 173158708, 216448385, 432896770, 865793540]

約数ペア:

[(1, 865793540), (2, 432896770), (4, 216448385), (5, 173158708), (10, 86579354), (20, 43289677), (109, 7943060), (218, 3971530), (436, 1985765), (545, 1588612), (1090, 794306), (2180, 397153)]