78864400

素因数分解:

$2^4\times 5^2\times {\mathrm{197161}}^1$

素因数の和:197179

約数の個数: 30

約数和(自身を含む): 189472682

約数和(自身を除く): 110608282

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 197161, 394322, 788644, 985805, 1577288, 1971610, 3154576, 3943220, 4929025, 7886440, 9858050, 15772880, 19716100, 39432200, 78864400]

約数ペア:

[(1, 78864400), (2, 39432200), (4, 19716100), (5, 15772880), (8, 9858050), (10, 7886440), (16, 4929025), (20, 3943220), (25, 3154576), (40, 1971610), (50, 1577288), (80, 985805), (100, 788644), (200, 394322), (400, 197161)]