78720940

素因数分解:

$2^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{12821}}^1$

素因数の和:13137

約数の個数: 24

約数和(自身を含む): 165865392

約数和(自身を除く): 87144452

約数列:

[1, 2, 4, 5, 10, 20, 307, 614, 1228, 1535, 3070, 6140, 12821, 25642, 51284, 64105, 128210, 256420, 3936047, 7872094, 15744188, 19680235, 39360470, 78720940]

約数ペア:

[(1, 78720940), (2, 39360470), (4, 19680235), (5, 15744188), (10, 7872094), (20, 3936047), (307, 256420), (614, 128210), (1228, 64105), (1535, 51284), (3070, 25642), (6140, 12821)]