78142780

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{4759}}^1$

素因数の和:5589

約数の個数: 24

約数和(自身を含む): 164334240

約数和(自身を除く): 86191460

約数列:

[1, 2, 4, 5, 10, 20, 821, 1642, 3284, 4105, 4759, 8210, 9518, 16420, 19036, 23795, 47590, 95180, 3907139, 7814278, 15628556, 19535695, 39071390, 78142780]

約数ペア:

[(1, 78142780), (2, 39071390), (4, 19535695), (5, 15628556), (10, 7814278), (20, 3907139), (821, 95180), (1642, 47590), (3284, 23795), (4105, 19036), (4759, 16420), (8210, 9518)]