20407514900

素因数分解:

$2^2\times 5^2\times {\mathrm{821}}^1\times {\mathrm{248569}}^1$

素因数の和:249404

約数の個数: 36

約数和(自身を含む): 44338425180

約数和(自身を除く): 23930910280

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 821, 1642, 3284, 4105, 8210, 16420, 20525, 41050, 82100, 248569, 497138, 994276, 1242845, 2485690, 4971380, 6214225, 12428450, 24856900, 204075149, 408150298, 816300596, 1020375745, 2040751490, 4081502980, 5101878725, 10203757450, 20407514900]

約数ペア:

[(1, 20407514900), (2, 10203757450), (4, 5101878725), (5, 4081502980), (10, 2040751490), (20, 1020375745), (25, 816300596), (50, 408150298), (100, 204075149), (821, 24856900), (1642, 12428450), (3284, 6214225), (4105, 4971380), (8210, 2485690), (16420, 1242845), (20525, 994276), (41050, 497138), (82100, 248569)]