64821520

素因数分解:

$2^4\times 5^1\times {\mathrm{810269}}^1$

素因数の和:810282

約数の個数: 20

約数和(自身を含む): 150710220

約数和(自身を除く): 85888700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810269, 1620538, 3241076, 4051345, 6482152, 8102690, 12964304, 16205380, 32410760, 64821520]

約数ペア:

[(1, 64821520), (2, 32410760), (4, 16205380), (5, 12964304), (8, 8102690), (10, 6482152), (16, 4051345), (20, 3241076), (40, 1620538), (80, 810269)]