20787280

素因数分解:

$2^4\times 5^1\times {\mathrm{259841}}^1$

素因数の和:259854

約数の個数: 20

約数和(自身を含む): 48330612

約数和(自身を除く): 27543332

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 259841, 519682, 1039364, 1299205, 2078728, 2598410, 4157456, 5196820, 10393640, 20787280]

約数ペア:

[(1, 20787280), (2, 10393640), (4, 5196820), (5, 4157456), (8, 2598410), (10, 2078728), (16, 1299205), (20, 1039364), (40, 519682), (80, 259841)]