64803920

素因数分解:

$2^4\times 5^1\times {\mathrm{810049}}^1$

素因数の和:810062

約数の個数: 20

約数和(自身を含む): 150669300

約数和(自身を除く): 85865380

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810049, 1620098, 3240196, 4050245, 6480392, 8100490, 12960784, 16200980, 32401960, 64803920]

約数ペア:

[(1, 64803920), (2, 32401960), (4, 16200980), (5, 12960784), (8, 8100490), (10, 6480392), (16, 4050245), (20, 3240196), (40, 1620098), (80, 810049)]